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B&K 2245 User Manual

Enviro noise partner
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Enviro Noise Partner
with B&K 2245
User Guide
for Version 1.0
BN 2375–11

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Summary of Contents for B&K 2245

  • Page 1 Enviro Noise Partner with B&K 2245 User Guide for Version 1.0 BN 2375–11...

  • Page 3: Table Of Contents

    TABLE OF CONTENTS TABLE OF CONTENTS INTRODUCTION Overview Licences About About the Instrument About the Mobile App About the PC App System Requirements Data Storage Service and Support Contact Information Additional Documentation GET STARTED Hardware Interface Instrument GUI How to Display the GUI in a Web Browser Install the Apps Download the Mobile App Download the PC App...
  • Page 4 Table of Contents: Status Power Consumption SET UP THE INSTRUMENT Regional Settings How to Change Regional Settings About the Settings Input Settings How to Set up the Input About the Microphone About Sound Fields Measurement Control How to Set up Measurement Controls About Logging Mode About Measurement Time About Back-erase Mode...
  • Page 5 Table of Contents: Custom Calibration CREATE A PROJECT How to Delete a Project Add Past Measurements Set up Markers MEASUREMENTS Make a Measurement Data explorer Data Management Use the App to Make a Measurement Place Markers How to Add a Marker How to Remove a Marker ANNOTATIONS How to Make Annotations...
  • Page 6 Table of Contents: Examine the Project The Measurement Window The Spectrum Window The Graph View The Table View Review Annotations Work with Markers Export a Project How to Export a Project About Master Files TERMINOLOGY...

  • Page 7: Introduction

    Introduction: Overview INTRODUCTION Overview Your instrument works with applications: Noise Partner is the default, general-purpose application for measuring sound levels Enviro Noise Partner is for measuring and analysing sound levels in the world around us Work Noise Partner is for determining sound exposure levels in the workplace There is a mobile version and a PC version of each app.

  • Page 8: Licences

    Introduction: Licences Licences B&K 2245 is a type-approved sound level meter (SLM). However, this basic functionality can be extended with optional licences; it can perform frequency analysis, log broadband and spectral data, perform statistical analysis and make audio recordings. Licences for the instrument control the functionality of the instrument and to which applications it can connect.

  • Page 9: About The Mobile App

    Introduction: About The instrument performs frequency analysis of either 1/1- or 1/3-octave spectra (Leq, Lmax, Lmin) with one of the avail- able frequency weightings (A, B, C, Z) and time weightings (F, S). The instrument takes single measurements. In other words, the instrument calculates a single value for each measured parameter for the total measurement time.

  • Page 10: About The Pc App

    Introduction: System Requirements About the PC App Functionality of the PC version of Enviro Noise Partner: Import projects created with the mobile app from the instrument Create projects from measurements stored on the instrument Add measurements stored on the instrument to an existing project Create custom markers and add them to measurements View: Broadband levels...

  • Page 11: Data Storage

    Introduction: Data Storage Data Storage The Instrument Data storage: Approximately 12 GB The instrument has 16 GB of built-in storage, of which approximately 12 GB is available for data storage. All meas- urement data and annotations are stored on the instrument. Measurements and annotations are imported to the PC application from the instrument. They can then be saved to your computer or to a location on a network.

  • Page 12: Additional Documentation

    Additional Documentation Product Data B&K 2245 with Noise Partner: BP 0029 B&K 2245 with Enviro Noise Partner: BP 0030 B&K 2245 with Work Noise Partner: BP 0031 B&K 2245 with Exhaust Noise Partner:...

  • Page 13: Get Started

    Started: Hardware Interface GET STARTED Hardware Interface The microphone is at the top of the instrument. is the power/menu/reset button. Press and hold the button to power the instrument on or off. When the instrument is on, press the but- ton briefly to open the menu.
  • Page 14 Started: Hardware Interface is the stop/reset button. Press the button once to stop a measurement. At this point, averaged measurement parameters will stop updating and you can review the results. Press the button again to clear the results and reset the instrument for the next measurement.

  • Page 15: Instrument Gui

    Started: Instrument GUI The light ring is colour-coded to reflect the status of the instrument. The light ring is solid green while measuring. The light ring flashes yellow slowly while idle or quickly while paused (measuring). The light ring flashes red quickly for intermittent overloads. The light ring is solid purple for latched overloads.
  • Page 16 Started: Instrument GUI The top region shows measurement information and instrument status. When idle, the instrument displays the current time (to the left) and input settings (to the right). : Indicates that Sound field is set to Free-field and there is no windscreen : Indicates that Sound field is set to Free-field and there is a windscreen : Indicates that Sound field is set to Diffuse-field and there is no windscreen : Indicates that Sound field is set to Diffuse-field and there is no windscreen...
  • Page 17 Started: Instrument GUI The number in the centre is the measurement number. The first measurement of every day is number 1. The number increments with each new measurement. The background colour of the top region and the centre symbol change to indicate the state of the instrument.
  • Page 18 Started: Instrument GUI The bar graph shows the instantaneous sound level (L) with frequency and time weightings. This display is sometimes called the fast bar or fast display. : Indicates the maximum instantaneous sound level during a measurement. ✐ Note: The bar graphs in SLM view and List view are unique, that is they can each be set to show a different para- meter.
  • Page 19 Started: Instrument GUI For very low or very high sound levels, you will see indicators. : Indicates a signal that is under the measurement range. Overload occurs when the signal is over the measurement range. There are two types of overload indicators: latched and instantaneous. The latched-overload indic- ator is triggered at the first instance of overload and persists until the instrument is reset.

  • Page 20: How To Display The Gui In A Web Browser

    Started: Instrument GUI The Menu Use the buttons on the instrument to interact with the menu. : open / close the menu; open a response dialog; confirm a setting in a response dialog; enable/disable parameter selection boxes : navigate up a list; increment a value in a response dialog : navigate down a list;...

  • Page 21: Install The Apps

    Started: Install the Apps ✐ Note: You can find the instrument's IP address here: System settings > Network settings. Look under Wi-Fi settings or Ethernet settings depending on your connection. Install the Apps Download the Mobile App You will need: iPhone® See supported iOS versions for current app version in the App Store®, under Enviro Noise Partner >...

  • Page 22: Local Connections

    Local Connections Procedure: 1. Go to: https://www.bksv.com/en/Service/downloads. 2. From the list of available downloads, expand B&K 2245 Downloads. 3. Click B&K 2245 Software downloads. 4. Click the link to install the Enviro Noise Partner desktop app on your PC. 5. Once the download is complete, double-click Setup.exe to start installation.

  • Page 23: Use The Instrument As A Hotspot

    Started: Remote Connections d. Go to: Wi-Fi name. e. Select the network you wish to join. f. Enter the password at the prompt. to scroll through the character menu. to move left or right. Press to advance to the options: OK or Cancel. Use the Instrument as a Hotspot Connect your mobile device and / or PC to the instrument's hotspot so that the devices can communicate.

  • Page 24: How To Connect Remotely Via An Ipv4 Address

    Started: Remote Connections ✐ Note: Remote connection is optional. In other words, you do not need to be able to connect to your instrument remotely in order to use it with the mobile and PC apps. Please refer to the manufacturer of your router or to your Internet service provider (ISP) for information spe- cific to your network.

  • Page 25: How To Connect Remotely Via An Ipv6 Address

    Started: Remote Connections a. You can find the IPv4 address of the instrument on the instrument or on the router. On the instrument, go to: Menu > Network settings > Wi-Fi settings or Ethernet settings > IP address On the router, there should be a list of the connected devices b.

  • Page 26: Connect The Mobile App To The Instrument

    Started: Connect the Mobile App to the Instrument 3. Enter the IPv6 address of your instrument. To find the IPv6 address, go to: Menu > Network settings > Wi-Fi settings or Ethernet settings > IPv6 address ✐ Note: Enter the address in brackets, for example: [2701:db8:424d:d15::1a2f::]. 4.

  • Page 27: How To Add The Instrument Manually

    Started: Connect the Mobile App to the Instrument That's it! The instrument shows when it is connected to the mobile app. Once the mobile app has connected to an instrument, the app will remember the instrument and re-establish a con- nection automatically after separation.

  • Page 28: Troubleshooting Connection Problems

    Started: Mobile App GUI Troubleshooting Connection Problems Check that the instrument is set to act as a hotspot (System settings > Network settings > Wi-Fi settings > Wi-Fi mode) Check that the instrument is generating a hotspot, it will show Check that Wi-Fi is enabled on the mobile device Make sure that the two devices are within range Try turning Wi-Fi off and on again on the mobile device...
  • Page 29 Started: Mobile App GUI The project screen has two parts: Measurements and Setup. Use the tabs on the bottom to navigate between the two. Setup is for setting up markers. Tap Markers to edit the name of and assign a func- tion to each of the markers.
  • Page 30 Started: Mobile App GUI Measurements is for adding measurements to the project. Tap Import to add meas- urements that are stored on the instrument or tap Measure to open the meas- urement screen and make new measurements. to close the measurement screen and return to the project screen.
  • Page 31 Started: Mobile App GUI The mobile app displays the same colour, status icon and measurement number as the instrument. Tap to access the instrument menu. The icon also indicates status. means there is no connection between the instru- ment and the mobile app. means that the wireless signal is weak.
  • Page 32 Started: Mobile App GUI to access information about the mobile app and help. Use the navigation bar to change between Total (left), Profile (centre) and Annotations (right). Total displays instantaneous parameters, para- meters that are calculated for the total meas- urement time, and frequency analysis parameters.
  • Page 33 Started: Mobile App GUI Swipe left or right to switch between views. Tap on a parameter to change the parameter being displayed. Tap and drag to move items in the list. Profile displays the logged broadband and/or spec- trum parameters (Profile view). It is the main dis- play for logged measurements.
  • Page 34 Started: Mobile App GUI During a measurement, the mobile app shows the measurement start time ( and the measurement duration time ( Add markers to your measurements to make a note of events in the measurement. Tap a marker to start applying it, tap it a second time to stop applying it. You can apply one or more markers simultaneously.

  • Page 35: Charge The Battery

    Started: Charge the Battery to reset the instrument for the next measurement. to open the annotation menu. to start a measurement. During a measurement, slide to the right to stop or slide to the left to pause. Charge the Battery The instrument has an internal Lithium-ion rechargeable battery.

  • Page 36: Status

    Started: Charge the Battery Status Go to Menu > Status to see the status of the battery. Status: Either Full, Charging, or Discharging Time remaining: The approximate time left on the charge Charged: The percentage to which the battery is currently charged Max capacity: The percentage of the total amount of energy of the battery when it is of the fully charged Power Consumption Settings for the screen and wireless configuration can have a noticeable effect on the instrument's power consumption.

  • Page 37: Set Up The Instrument

    Set up the Instrument: Regional Settings SET UP THE INSTRUMENT Regional Settings Regional settings allow you to choose the language, date and time settings of the instrument. How to Change Regional Settings 1. Open the menu. From the instrument: Press briefly to open the menu.

  • Page 38: Input Settings

    Set up the Instrument: Input Settings Input Settings Input settings ensure that you are collecting accurate data. The instrument optimizes the frequency response based on the selected microphone and makes corrections based on the selected sound field and windscreen. How to Set up the Input 1.

  • Page 39: About Sound Fields

    Set up the Instrument: Measurement Control About Sound Fields It is important that the instrument knows the type of sound field in which you are measuring so it can apply the appro- priate correction to your measurements. Theses corrections will enhance the overall frequency response of the system regardless of whether or not the microphone you are using is designed for the sound field in which you are measuring.

  • Page 40: About Measurement Time

    Set up the Instrument: Measurement Control The instrument can log broadband parameters as well as spectrum parameters. About Measurement Time Preset measurement time means that the instrument will measure for the specified Preset time, then stop and save automatically Free measurement time means that you control the measurement manually...

  • Page 41: About Back-Erase Mode

    Set up the Instrument: Measurement Parameters About Back-erase Mode This setting determines what happens when you resume a paused measurement. Hint: You can change these settings while a measurement is paused. Enable: Overwrite measurement data for the Back-erase time Disable: Resume the measurement without overwriting earlier data Measurement Parameters How to Set up Broadband Parameters The instrument measures basic broadband sound level parameters with frequency weightings that mimic how humans...
  • Page 42 Set up the Instrument: Measurement Parameters Use the Instrument 1. Press briefly to open the menu. 2. Go to: Measurement settings > Broadband parameters. 3. Enable a frequency weighting. a. Press to navigate to a weighting box. b. Press to scroll through the frequency weightings. c.
  • Page 43 Set up the Instrument: Measurement Parameters a. Press to navigate to a parameter. b. Press to enable / disable parameters. 5. Navigate to 6. Press to close the parameter selection menu. Use the Mobile App 1. Tap to open the instrument menu. 2.
  • Page 44 Set up the Instrument: Measurement Parameters About Parameters Time-averaged Levels The instrument can average levels of the sound source over time. Leq = equivalent continuous sound level This parameter calculates a constant level of noise with the same energy content as the varying acoustic noise sig- nal being measured.
  • Page 45 Set up the Instrument: Measurement Parameters About Time Weightings The instrument uses three standard-defined time weightings: F, S and I. Time weightings define the exponential aver- aging in the root-mean-square (RMS) measurement to average the fluctuations in sound levels and create useful read- ings.
  • Page 46 Set up the Instrument: Measurement Parameters B-weighting Represents the human ear’s response at medium sound levels Corresponding equal loudness curve: 70 dB C-weighting Represents the human ear’s response at fairly high sound levels Corresponding equal loudness curve: 100 dB Mainly used when assessing peak values of high sound pressure levels (LCpeak) Z-weighting Without any frequency weighting ✐...

  • Page 47: Spectrum Parameters

    Set up the Instrument: Measurement Parameters LF(SPL) LAF(SPL) LCF(SPL) LZF(SPL) LBF(SPL) LS(SPL) LAS(SPL) LCS(SPL) LZS(SPL) LBS(SPL) Spectrum Parameters Spectrum parameters are the parameters upon which you can perform spectral analysis. Spectral analysis is used to assess sounds with distinct tones. Measure spectrum parameters (Leq, Lmax and Lmin) with frequency weightings (A, B, C, or Z) and time weightings (F and S).
  • Page 48 Set up the Instrument: Measurement Parameters Lmax is often used in conjunction with another noise parameter (for example, Leq) to ensure a single noise event does not exceed a limit. Lmin = minimum sound level This parameter gives you the lowest time-weighted sound level per frequency band that occurs during the meas- urement time.
  • Page 49 Set up the Instrument: Measurement Parameters About Frequency Weightings Frequency weightings mimic how humans hear sound. A-weighting Represents the human ear’s response at low to medium sound levels Corresponding equal loudness curve: 40 dB The most commonly applied frequency weighting Can be used for all sound levels B-weighting Represents the human ear’s response at medium sound levels Corresponding equal loudness curve: 70 dB...

  • Page 50: Statistical Parameters

    Set up the Instrument: Measurement Parameters Table of Parameters This table gives an overview of all the possible parameter / frequency weighting combinations. ✐ Note: The parameters are listed as they appear in the Spectrum parameters menu. LAeq LCeq LZeq LBeq LFmax LAFmax...

  • Page 51: Audio Recording

    Set up the Instrument: Audio Recording LAS is sampled every 128 ms LAS is the instantaneous time-weighted (S) sound level with frequency weighting A. LAeq is sampled every 1 s LAeq is the equivalent continuous sound level with frequency weighting A. About Percentiles You can set up to five percentile levels (LN values).

  • Page 52: How To Change Display Settings

    Set up the Instrument: Display Settings How to Change Display Settings 1. Open the menu. From the instrument: Press briefly to open the menu. From the app: Tap to open the instrument menu. 2. Go to: Display settings. 3. Adjust the screen settings: brightness and colour scheme. 4.

  • Page 53: About Data View

    Set up the Instrument: Display Settings Graph max level, Graph min level (All views) SLM view and List view: Define the range (maximum and minimum levels) for the bar graph in dB. Spectrum view: Define the range (maximum and minimum levels) for the bar graph in dB. Profile view: Define the range (maximum and minimum levels) for the line graph in dB.

  • Page 54: Voltage Output

    Set up the Instrument: Voltage Output Voltage Output The USB-C socket is the output channel. Use an output cable such as AO-0846 to collect the signal. To set up the instrument to generate an output signal: 1. Open the menu. On the instrument: Press briefly to open the menu.

  • Page 55: Check The Calibration

    Check the Calibration: How to Perform a Calibration Check CHECK THE CALIBRATION It is a best practice to check the accuracy of your instrument before and after measuring by performing a calibration check. A calibration check is not a calibration. Calibration includes an adjustment of the instrument's sensitivity. A cal- ibration check compares the current sensitivity of the instrument with the sensitivity from its initial calibration, checking that it has not changed too much.
  • Page 56 Check the Calibration: How to Perform a Calibration Check 3. Turn on the sound calibrator. 4. After a short period the instrument will initiate a calibration check, choose Yes. 5. The calibration check will have one of two results: Pass – the measured sound level is within tolerance. The instrument is ready for use Fail –...

  • Page 57: Calibration History

    Check the Calibration: Calibration History Calibration History Go to: Menu > Calibration history Here you can view an instrument's history of calibrations and calibration checks. Calibration Settings Go to Menu > System settings > Advanced settings > Calibration for calibration settings. Automatic Calibration Check The instrument is set to perform a calibration check automatically by default.

  • Page 58: Create A Project

    Create a Project: How to Delete a Project CREATE A PROJECT Projects are collections of measurements, markers and annotations. Projects are named incrementally and organized by date and time. Projects are stored on the instrument and trans- ferred to the PC app for post-processing (analysis and report generation). To start a new project: 1.
  • Page 59 Create a Project: Add Past Measurements 1. Open an existing project or create a new one. 2. Tap Import. 3. Tap a measurement to add it to the project. 4. Repeat as needed. To delete measurements from a project, swipe left and tap Delete.

  • Page 60: Set Up Markers

    Create a Project: Set up Markers Set up Markers Use markers to mark your logged measurements. Adding markers to your measurement can provide you with valuable information when processing the data. For example, if you are measuring the noise from a factory in a neighbourhood, you might want to mark when a dog is barking so that it is not attributed to the factory.
  • Page 61 Create a Project: Set up Markers 4. Tap a marker. 5. Tap the marker name to rename it. 6. Tap the function to select a function for the marker.
  • Page 62 Create a Project: Set up Markers ✐ Note: The changes to a marker only affect markers placed in future measurements. You can also edit the Exclude marker. You can assign a different colours to the markers using the PC app.

  • Page 63: Measurements

    Measurements: Make a Measurement MEASUREMENTS Make a Measurement The exact steps of a measurement will vary depending on the settings you use in Measurement control. A basic overview is as follows: 1. Press to start a measurement. 2. If necessary, press to pause.

  • Page 64: Data Explorer

    Measurements: Make a Measurement ✐ Note: You will not need to stop the measurement if it has a preset time. See: Menu > Measurement settings > Meas- urement control Data is stored automatically upon stopping If you are using the instrument with the mobile app, annotations will be synced with the measurement and saved on the instrument Data explorer Go to: Menu >Data explorer...

  • Page 65: Use The App To Make A Measurement

    Measurements: Use the App to Make a Measurement Use the App to Make a Measurement The exact steps of a measurement will vary depending on the settings you use in Measurement control. A basic overview is as follows: 1. Open an existing project or create a new one. 2.

  • Page 66: How To Add A Marker

    Measurements: Place Markers How to Add a Marker ✐ Note: To enable markers for a measurement, make sure that Logging mode is set to Enabled. 1. Tap a marker at the start of an event. Hint: Tap a marker to start a measurement if the instrument is not measuring. 2.

  • Page 67: Annotations

    Annotations How to Make Annotations ANNOTATIONS Use the mobile app to add notes to your measurement. How to Make Annotations 1. From the measurement screen, tap 2. Choose the kind of annotation you want to add: : Photos : Videos : Notes : Commentaries 3.

  • Page 68: How To Attach Unattached Annotations Using The Mobile App

    Annotations How to Attach Unattached Annotations Using the Mobile App How to Attach Unattached Annotations Using the Mobile App To attach an annotation to a measurement, a measurement must be open or in progress. 1. Navigate to Annotations. 2. Tap Attach at the desired annotations (or tap if you want to create more annotations.)

  • Page 69: Transfer Data

    Transfer Data How to Import Data to the PC App TRANSFER DATA You will need to move your data from the instrument in order to process it. You can transfer data using one of the fol- lowing methods: Import data from the instrument to the PC app then save it as a project to a local or shared location Store a backup of your data on a USB stick or network then access it from the PC app How to Import Data to the PC App You will need:...
  • Page 70 Transfer Data How to Import Data to the PC App ✐ Note: To import from a backup, click on the storage location. 4. Click Measurements/Annotations. 5. Select the data you want to transfer. Hint: Use <Ctrl> or <Shift> to select multiple measurements or annotations. 6.

  • Page 71: How To Add An Instrument Using Its Ip Address

    Transfer Data How to Add an Instrument using Its IP Address Data, including attached annotations and markers will be imported to the PC app where it can be saved as a project. ✐ Note: If you import multiple measurements with markers, the markers from different measurements that have the same name will be treated as the same marker type upon import.

  • Page 72: Usb Stick

    Transfer Data How to Store a Backup USB Stick You will need: A USB-C (or USB-A with an adaptor) memory stick with at least 16 GByte formatted as FAT32 or exFAT Your instrument Procedure: 1. Go to: Menu > System settings > Data management > Backup settings > Backup. 2.

  • Page 73: Use The Pc App

    Use the PC App: PC App GUI USE THE PC APP PC App GUI The application tab opens / closes the system menu where you will find information about the application and its options. Options: Change the language of the GUI About: Information about the application Exit: Close the application...
  • Page 74 Use the PC App: PC App GUI These are the tools that control the operation of the application. : Create a new project : Open an existing project : Save the current project : Save the current project under a new name or in another location : Import data from the instrument or network storage : Export project contents into another format : Open the help...
  • Page 75 Use the PC App: PC App GUI When you open a project or import data, you will see the individual measurements in the project browser window. Select measurements to view them. Project Name: Unnamed projects appear as Untitled in the toolbar : Select all measurements in the project browser...
  • Page 76 Use the PC App: PC App GUI Unattached Annotations displays annotations that are not linked to a measurement. Unattached annotations are organized by type: Gallery (photos and videos), Commentaries and Notes. Tasks, such as importing data or exporting a project, are displayed in this window.
  • Page 77 Use the PC App: PC App GUI These tabs are for switching between the Measurement and Gallery windows. Within the Measurement window, there are two areas. The upper section is an overview of the selected meas- urements in a project. It will help keep you oriented while you investigate the graph and table views in the section below.

  • Page 78: Import A Project

    Use the PC App: Import a Project In this panel, you will find collapsible windows for viewing data and your annotations. Spectrum: View frequency analysis data Gallery: View photos and videos attached to the measurement Commentaries: Listen to voice memos attached to the measurement Notes: Read the notes attached to the measurement Marker Settings: Edit the name and function of the markers for the project Import a Project...
  • Page 79 Use the PC App: Import a Project Hint: Instead of using a cable, connect the two devices to the same network using Wi-Fi®. 3. In the PC app, click 4. Find your instrument in the import dialog and select it. ✐...

  • Page 80: Import From A Backup

    Use the PC App: Import a Project Import from a Backup The first time you import from a backup, you will need to tell the PC app where the backup is stored. You will need: An instrument that is set up to store a backup of its data, see Transfer Data Data in the backup Procedure:...

  • Page 81: Create A Project

    Use the PC App: Create a Project For remote connections, the IP address or host name will depend on your setup. Refer to Remote Con- nections for information about which IP address or host name to use 4. Click OK. Create a Project If you did not create a project using the mobile app, you can create a project in the PC app then import measurements as needed.

  • Page 82: How To Import Measurements

    Use the PC App: Import Measurements How to Import Measurements 1. Connect the instrument to the computer using the cable. Hint: Instead of using a cable, connect the two devices to the same network using Wi-Fi®. 2. In the PC app, click 3.

  • Page 83: Import From A Backup

    Use the PC App: Import Measurements Hint: Use <Ctrl> or <Shift> to select multiple measurements or annotations. 6. Click Import. Import from a Backup The first time you import from a backup, you will need to tell the PC app where the backup is stored. You will need: An instrument that is set up to store a backup of its data, see Transfer Data...

  • Page 84: Add An Instrument Using Its Ip Address

    Use the PC App: Examine the Project Procedure: 1. In the import dialog, click 2. Click Add NAS. 3. Browse to the location of the backup. ✐ Note: Your computer will need to be able to access this location. 4. Select the folder with the matching serial number of your instrument. 5.
  • Page 85 Use the PC App: Examine the Project The Graph View For single measurements, that is when Logging mode is disabled, each measured parameter is a single, calculated dB level for the total measurement time. This means that their graphs will be horizontal lines. You can use this display to eas- ily see the differences in the calculated values for each measured parameter.
  • Page 86 Use the PC App: Examine the Project Read Levels Click on a graph to place a cursor. For single measurements, the cursor shows dB levels for all visible parameters and time information. The time inform- ation is the measurement start with the total measurement time (in parentheses). For logged measurements, the cursor shows dB levels for all visible parameters and time information.

  • Page 87: The Spectrum Window

    Use the PC App: Examine the Project Delete Markers 1. Right-click on a marker. 2. Select Delete Marker to remove the marker from the measurement. Change Markers 1. Right-click on a marker. 2. Mouse over Change Marker to open a menu of markers. 3.

  • Page 88: The Graph View

    Use the PC App: Examine the Project while the other set of data displays as bars (and corresponds to the fields in line with ). Change the fields to change the data that is being displayed. 1. Use the measurement drop-down to switch between measurements if more than one measurement is selected in the measurement list.

  • Page 89: Work With Markers

    Use the PC App: Examine the Project 3. Use the arrows to browse. ✐ Note: Videos will be identifiable by a play button. Listen to Commentary You will find any voice memos that have been attached to the measurements in the project in the Commentaries win- dow.
  • Page 90 Use the PC App: Examine the Project Add a Marker You can add markers to a measurement in the PC app. 1. Select a range. 2. Right-click. 3. Mouse over Add Marker. 4. Select the desired marker from the submenu. ✐...

  • Page 91: Export A Project

    Use the PC App: Export a Project Export a Project Export your project to a Microsoft® Excel® workbook or a text file. How to Export a Project 1. In the project browser, highlight the measurements you want to export. 2. Click 3.

  • Page 92: About Master Files

    Use the PC App: Export a Project Export unattached annotations: Include unattached annotations in the exported file Export raw statistical data: Include statistical data in the workbook ✐ Note: The export format you choose will affect the available options. 7. Click OK. About Master Files When you export a measurement to a workbook, the master file you choose tells the PC app what to do with the data.
  • Page 93 Use the PC App: Export a Project c. Use the Clear Contents option from the Edit menu to remove data but preserve the links to the empty cells. 3. Use the Save as... option to name your new report master file and save it to the same location as the other mas- ter files.

  • Page 94: Terminology

    Terminology: Export a Project TERMINOLOGY Frequency weighting corresponding approximately to the 40 dB equal loudness curve, that is to say, A-weighting the human ear’s response at low to medium sound levels. It is by far the most commonly applied fre- filter quency weighting and is used for all levels of sound.
  • Page 95 Terminology: Export a Project hearing for a healthy young person ranges from approximately 20 Hz to 20000 Hz (20 kHz). Our hearing is less sensitive at very low and very high frequencies. In order to account for this, Frequency weighting filters can be applied when measuring sound. The most commonly used weighting is the weighting 'A-weighting', which approximates the human ear’s response to low - medium noise levels.
  • Page 96 Terminology: Export a Project Loudness is the subjective judgement of intensity of a sound by humans. Loudness depends upon the sound pressure and frequency of the stimulus and whether the sound field is diffuse- or free- Loudness field. The unit is the Sone. The Zwicker method of calculation of stationary loudness based on 1/3- octave measurements is described in ISO 532 - 1975, Method B.

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