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CRYSOUND CRY2850 User Manual

Sound level meters
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CRY2850、 CRY2851
SLM User Manual
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Summary of Contents for CRYSOUND CRY2850

  • Page 1 CRY2850、 CRY2851 SLM User Manual...

  • Page 2: Table Of Contents

    6.4.1. Quick Operations ..................22 6.4.2. Sound Level Meter ..................23 6.4.3. Statistical Analysis ...................30 6.4.4. 1/1OCT ......................37 6.4.5. 1/3OCT ......................44 6.4.6. Spectrum Analysis ..................51 6.4.7. Monitoring .....................59 6.4.8. Data Export Instructions ................ 68 6.5. Instrument Settings ....................69 E-mail：info@crysound.com Web: www.crysound.com...
  • Page 3 6.5.10. Device Mode ....................77 6.5.11. About ......................77 6.6. Peripheral Introduction and Use ............... 78 6.6.1. Printer Usage....................78 6.6.2. NA43 Outdoor Protection Device Usage ..........79 Appendix 1: Microphone Performance Parameters ............83 Appendix 2: Windshield Response Correction ...............85 E-mail：info@crysound.com Web: www.crysound.com...

  • Page 4: Contact Information

    For equipment failures caused by improper use, accidental drops, etc., our company promises to provide repair services at cost price. Contact Information Hangzhou Headquarters Phone: 0571-88225198 0571-88225128 Email: info@crysound.com Address: No. 10, Xianqiao Road, Zhongtai Street, Yuhang District, Hangzhou Company Website:WWW.CRYSOUND.COM Dongguan Branch Phone:0769-21688120...
  • Page 5 If the leakage contacts the eyes, rinse immediately with clean water and  seek medical attention. If the leakage contacts the skin, rinse immediately with clean water.  If storing for more than one month, keep the product in an environment  with a temperature below 40°C. E-mail：info@crysound.com Web: www.crysound.com...
  • Page 6 CRY2850 Type Approval Certificate E-mail：info@crysound.com Web: www.crysound.com...
  • Page 7 CRY2851 Type Approval Certificate E-mail：info@crysound.com Web: www.crysound.com...

  • Page 8: Overview

    1. Overview 1.1. Product Introduction CRY2850/CRY2851 sound level meter equipped with high-performance processor, specifically designed measuring occupational, environmental, and product noise. While meeting the requirements for accurate and reliable acoustic measurements, the device also supports functions such as frequency analysis, data logging, and wireless control and transmission.

  • Page 9: System Block Diagram

    1.2. System Block Diagram Fig 1.1 Sound Level Meter System Block Diagram 1.3. Product Photos Fig 1.2 Photos of CRY2850 and CRY2851 Sound Level Meters E-mail：info@crysound.com Web: www.crysound.com...

  • Page 10: Product Features

    6. Supports connection to Bluetooth printers for printing test data at any time. 7. 4-inch capacitive touch screen with button collaboration for convenient operation. 3. Performance Specifications Sound Level Meter Technical Specifications Model CRY2850 CRY2851 CRY331 Free-field 1/2" CRY333 Free-field 1/2"...
  • Page 11 Approximately 3.5 hours to full at room temperature External Interfaces RJ45, WiFi, Bluetooth, 3.5mm headphone jack, USB Type-C Reference Sound Level 94 dB @ 1 kHz / 114 dB @ 1 kHz 23 ° C, atmospheric pressure 101.325 kPa, relative humidity Reference Environment E-mail：info@crysound.com Web: www.crysound.com...

  • Page 12: Structural Features

    -20°C to 60°C, relative humidity ≤ 90% (non-condensing), Operating Conditions 65 kPa - 108 kPa Dimensions L*W*H=260mm*90mm*40mm Weight 460g Control Method Touchscreen / Buttons 4. Structural Features Fig 4.1 Equipment Dimension Diagram E-mail：info@crysound.com Web: www.crysound.com...
  • Page 13 Fig 4.2 Front View of the Sound Level Meter Fig 4.3 Back View of the Sound Level Meter 3.5mm Audio Port RJ45 Port SD Card Slot USB Type-C Port Fig 4.4 Bottom View of the Sound Level Meter E-mail：info@crysound.com Web: www.crysound.com...
  • Page 14 The appearance of the instrument is shown in Figures 4.1, 4.2, and 4.3. The main components of the instrument include the microphone (CRY2850 uses CRY311, and CRY2851 uses CRY333), the pre-amplifier, and the sound level meter host. The device is equipped with a built-in 6600mAh lithium battery, and the screen resolution is 480x800, supporting touch operation.

  • Page 15: Parameter Definitions

    Fast time weighting Slow time weighting Impulse time weighting A-weighted sound level measured with F weighting A-weighted sound level measured with S weighting A-weighted sound level measured with I weighting C-weighted sound level measured with F weighting E-mail：info@crysound.com Web: www.crysound.com...

  • Page 16: Icon Definitions

    1/1 Octave Band 1/3 Octave Band Spectrum Analysis Monitoring App Settings Settings BT Connection GPS Location Network Settings Brightness Settings Time Settings Language Settings Storage Space Authorization Device Mode Switch About Device Function Buttons Exit Settings Start Testing Pause E-mail：info@crysound.com Web: www.crysound.com...

  • Page 17: Usage Instructions

    3. In testing scenarios with high wind speeds, the sound level meter should be used in conjunction with a windproof cover. 4. When monitoring outdoors for extended periods, it is recommended to use a tripod. E-mail：info@crysound.com Web: www.crysound.com...

  • Page 18: Powering On

    3. As shown in Figure 6.1, the current function menu includes settings, calibration, sound level meter, statistical analysis, 1/1 octave band, 1/3 octave band, spectrum analysis, Fig 6.1 Main Interface on and monitoring applications. Enter the Startup corresponding application interface clicking or using the buttons. E-mail：info@crysound.com Web: www.crysound.com...

  • Page 19: Instrument Calibration

    Fig 6.2 Calibration defaulting to 0.1 (suitable for the 1/2 inch Record Page free-field response measuring microphone CRY333 and CRY331). 4. Range: Records the measurement range of the sound level meter at the sensitivity level. E-mail：info@crysound.com Web: www.crysound.com...

  • Page 20: Calibration Procedure (With Calibrator)

    3. During calibration, place the calibrator over Fig 6.3 Device the microphone and turn the power on. Calibration 4. Once the calibrator stabilizes, press the "Calibrate" button;the interface will display "Calibrating." The sound pressure level should reflect the E-mail：info@crysound.com Web: www.crysound.com...

  • Page 21: Calibration History

    Figure 6.5. details include calibration time, sensitivity, correction, range, and calibration signal. Click the application button below to replace existing parameters with sensitivity from that calibration record. Fig 6.5 Calibration Records E-mail：info@crysound.com Web: www.crysound.com...

  • Page 22: Noise Measurement

    3、End Test: Click the far-right end button to conclude the test and save the data. 4、View Test Data: Enter the settings interface and click on data playback to view the test data. Fig 6.6 Prepare/End Test Fig 6.7 During Test Fig 6.8 Pause Test E-mail：info@crysound.com Web: www.crysound.com...

  • Page 23: Sound Level Meter

    Sound Pressure Level Bar: Visually displays the current sound pressure level. 3. Recording Indicator: Indicates that audio data is being saved during the test. 4. Operation Button Box: Four sets of buttons provide functionality for back, settings, start, pause, continue, and stop. E-mail：info@crysound.com Web: www.crysound.com...
  • Page 24 Figure 6.9. Display Settings: On this page, you can set the display and its contents, selecting the desired measurement target and display mode. Available display settings include single value mode, curve mode, and multi-value mode.在此页面中，可对显示 E-mail：info@crysound.com Web: www.crysound.com...
  • Page 25 Figure 6.13 for the “Timed Mode” settings. In this interface, users can select the appropriate mode based on their needs and set the corresponding duration for testing. E-mail：info@crysound.com Web: www.crysound.com...
  • Page 26 In manual mode, the test mode editing is not available. Fig 6.14 Manual Mode Parameter Settings b. Automatic Mode: After clicking the start test button in the main E-mail：info@crysound.com Web: www.crysound.com...
  • Page 27 Timed Mode: The application will automatically start testing at the user-defined start time, with a duration as set on the test settings interface. In timed testing mode, the options for test interval, repeat testing, and infinite repeat will be unavailable as they are meaningless. E-mail：info@crysound.com Web: www.crysound.com...
  • Page 28 When LAF reaches the set threshold, testing will start automatically, lasting for the duration specified by the user. Set Test Duration Interval Between Multiple Tests Trigger Recording Threshold Fig 6.17 Trigger Mode Parameter Settings 4. Data Playback Settings E-mail：info@crysound.com Web: www.crysound.com...
  • Page 29 Fig 6.19 Recording Mode Settings a. Automatic Mode: Recording starts as soon as testing begins, with no need to set a recording duration. b. Trigger Mode: Users can specify the recording duration; recording will E-mail：info@crysound.com Web: www.crysound.com...

  • Page 30: Statistical Analysis

    Fig 6.20 Main Interface of Statistical Analysis APP As shown in Figure 6.20, this is the measurement interface for statistical analysis, currently in "Data Mode." Test Data Display Box: Shows the specific values obtained during testing. 2. Test Data Information: E-mail：info@crysound.com Web: www.crysound.com...
  • Page 31 Clicking the "Settings" button in the operation button area will bring up the settings interface, as shown in Figure 6.21. Display Settings: In this page, users can set the display contents. Options include displaying Data Mode, LN Distribution, and Sound Pressure Level Distribution. E-mail：info@crysound.com Web: www.crysound.com...
  • Page 32 2. Display Content Settings: The following data types are available LAF, LAS, LCF, LCS, LZF, LZS Maximum LAFMax, LASMax, LCFMax, LCSMax, LZFMax, LZSMax Value Minimum LAFMin, LASMin, LCFMin, LCSMin, LZFMin, LZSMin Value E-mail：info@crysound.com Web: www.crysound.com...
  • Page 33 Manual Mode：The user manually starts and stops the measurement from the main interface button area. Figure 6.24 shows that in manual mode, the testing is entirely controlled by user actions, making any time settings in the testing mode configuration ineffective and uneditable. E-mail：info@crysound.com Web: www.crysound.com...
  • Page 34 When automatic testing is selected, the testing mode settings interface will appear as shown in Figure 6.25, where the start test duration cannot be edited. E-mail：info@crysound.com Web: www.crysound.com...
  • Page 35 In timed testing mode, the options for test interval, repeat testing, and infinite repeat will be unavailable as they are meaningless. 设定测试时长 测试开始时间 Fig 6.28 Timed Mode Parameter Settings d. Trigger Mode: Users can set the test duration and threshold in the E-mail：info@crysound.com Web: www.crysound.com...
  • Page 36 Clicking "Data Playback" takes you to the interface shown in Figure 6.15. In this mode, users can filter data based on time intervals and click on specific data points for preview. The upper function buttons include: Select, Select All, E-mail：info@crysound.com Web: www.crysound.com...

  • Page 37: 1/1Oct

    It offers two display modes: Data and Graph. There are four testing modes available: Manual Test, Automatic Test, Timed Test, and Trigger Test. The app saves per-second data from the test to the SD card in the DATA/1_1Octave directory and supports data playback and recording functions. E-mail：info@crysound.com Web: www.crysound.com...
  • Page 38 SD card directory. 3. Recording Indicator: Indicates that audio data is being saved during the test. 4. Operation Button Box: Four sets of buttons provide functionality for returning, settings, starting, pausing, continuing, and stopping. E-mail：info@crysound.com Web: www.crysound.com...
  • Page 39 Figure 6.31. 6. Display Settings: In this page, users can set the display and its contents, selecting the desired display mode. Options include Data Mode and Graph Mode. Fig 6.34 Graph Mode Fig 6.35 Data Mode E-mail：info@crysound.com Web: www.crysound.com...
  • Page 40 "Timed Mode" settings. In this interface, users can select the appropriate mode based on their needs and set the corresponding duration for testing. Test Duration Setting Select Test Mode Test Count Setting Exceedance Threshold Setting Fig 6.36 Testing Mode Settings E-mail：info@crysound.com Web: www.crysound.com...
  • Page 41 The number of repetitions is set by the user. If the infinite repeat option is enabled, automatic testing will continue until manually stopped by the user. The settings interface for automatic testing is shown in Figure 6.36, where the start test time cannot be edited. E-mail：info@crysound.com Web: www.crysound.com...
  • Page 42 Set Test Duration Test Start Time Fig 6.39 Timed Mode Parameter Settings d. Trigger Mode: In this mode, users can set the testing duration and threshold. When LAF reaches the specified threshold, testing will E-mail：info@crysound.com Web: www.crysound.com...
  • Page 43 Clicking "Data Playback" takes users to the interface shown in Figure 6.39. In this mode, users can filter data according to time intervals and click on specific data points to preview them. The function buttons include: Select, Select All, and Delete, allowing users to manage the data. Additionally, the E-mail：info@crysound.com Web: www.crysound.com...

  • Page 44: 1/3Oct

    Manual Test, Automatic Test, Timed Test, and Trigger Test. The app saves per-second data from the test to the SD card in the DATA/1_3Octave directory and supports data playback and recording functions. E-mail：info@crysound.com Web: www.crysound.com...
  • Page 45 SD card directory. 3. Recording Indicator: Indicates that audio data is being saved during the test. 4. Operation Button Box: Four sets of buttons provide functionality for return, settings, start, pause, continue, and stop. E-mail：info@crysound.com Web: www.crysound.com...
  • Page 46 Clicking the "Settings" button in the operation button area brings up the settings interface, as shown in Figure 6.42. Display Settings: In this page, users can set display preferences, choosing between Data Mode and Graph Mode. Fig 6.45 Graph Mode Fig 6.46 Data Mode E-mail：info@crysound.com Web: www.crysound.com...
  • Page 47 Fig 6.47 Testing Mode Settings a. Manual Mode:Users can manually start and stop measurements from the main interface. In this mode, as shown in Figure 6.46, the testing is controlled solely by the user, making any time settings in the testing E-mail：info@crysound.com Web: www.crysound.com...
  • Page 48 The number of repetitions is set by the user. If the infinite repeat option is enabled, automatic testing will continue until manually stopped. The settings interface for automatic testing is shown in Figure 6.49, where the start test time cannot be edited. E-mail：info@crysound.com Web: www.crysound.com...
  • Page 49 Set Test Duration Test Start Time Fig 6.50 Timed Mode Parameter Settings d. Trigger Mode: Users can set the testing duration and threshold. When LAF reaches the specified threshold, testing will automatically start, E-mail：info@crysound.com Web: www.crysound.com...
  • Page 50 Clicking "Data Playback" leads to the interface shown in Figure 6.52. In this mode, users can filter data according to time intervals and click on specific data points for preview. The function buttons include: Select, Select All, and Delete, allowing for data management. Additionally, the data playback E-mail：info@crysound.com Web: www.crysound.com...

  • Page 51: Spectrum Analysis

    Users can choose from four testing modes: Manual Test, Automatic Test, Timed Test, and Trigger Test. The app saves per-second data to the SD card in the DATA/FFT directory and supports data playback and recording functions. E-mail：info@crysound.com Web: www.crysound.com...
  • Page 52 Storage Number: Identifier for current test data, useful for data playback. 4. Recording Indicator: Indicates that audio data is being saved during the test. 5. Operation Button Box: Buttons for returning, settings, starting, pausing, continuing, and stopping. E-mail：info@crysound.com Web: www.crysound.com...
  • Page 53 LAF, LAS, LCF, LCS, LZF, LZS Maximum LAFMax, LASMax, LCFMax, LCSMax, LZFMax, LZSMax Value Minimum LAFMin, LASMin, LCFMin, LCSMin, LZFMin, LZSMin Value LAeq, LCeq, LZeq Peak SPL LApeak, LCpeak, LZpeak a. FFT settings for frequency weighting and time weighting. E-mail：info@crysound.com Web: www.crysound.com...
  • Page 54 Figure 6.57, which displays the test time settings under "Timed Mode." In this interface, you can choose the appropriate mode based on different needs and set the corresponding time for testing. E-mail：info@crysound.com Web: www.crysound.com...
  • Page 55 Test Mode Settings are ineffective and cannot be edited. In manual mode, the test mode editing is not available. Fig 6.58 Manual Mode Parameter Settings b. Automatic Mode： When the user clicks the start test button on the E-mail：info@crysound.com Web: www.crysound.com...
  • Page 56 As shown below, in Timed Mode, the options for test interval, repeat testing, and infinite repeat in the test settings interface will be unavailable due to their irrelevance. E-mail：info@crysound.com Web: www.crysound.com...
  • Page 57 When the LAF reaches the set threshold, testing will automatically begin, and the test duration will be the value set by the user. Set Test Duration Interval Between Multiple Tests Trigger Recording Threshold Fig 6.61 Triggered Mode Parameter Settings 9. Data Playback Settings E-mail：info@crysound.com Web: www.crysound.com...
  • Page 58 Fig 6.63 Recording Mode Settings a. Automatic Mode: Recording starts as soon as the test begins, without needing to set the recording duration. b. Triggered Mode: You can set the recording duration as needed. When E-mail：info@crysound.com Web: www.crysound.com...

  • Page 59: Monitoring

    CIC calibration functions, commonly used for long-term outdoor monitoring scenarios or third-party customer integration development. 6.4.7.1. Monitoring Test Interface Fig 6.64 Single Data Fig 6.65 Multiple Data Fig 6.66 LN Distribution Mode Mode E-mail：info@crysound.com Web: www.crysound.com...
  • Page 60 The monitoring APP homepage can switch between five display modes: Data Mode (Single Data/Multiple Data), LN Distribution, Sound Pressure Level Distribution, 1/1 Octave Band, and 1/3 Octave Band. For detailed display content, refer to the descriptions in each APP. 6.4.7.2. Monitoring APP Settings E-mail：info@crysound.com Web: www.crysound.com...
  • Page 61 Sound Pressure Distribution: Allows switching the time and frequency weighting type for testing sound pressure; d. 1/1 and 1/3 Octave Bands: The selectable data types are as follows: LAF, LAS, LCF, LCS, LZF, LZS Maximum LAFMax, LASMax, LCFMax, LCSMax, LZFMax, LZSMax E-mail：info@crysound.com Web: www.crysound.com...
  • Page 62 Fig 6.71 Recording Settings E-mail：info@crysound.com Web: www.crysound.com...
  • Page 63 If the calibration result deviates more than 0.5 dB from the standard of 94 dB, an automatic prompt will be generated. Sound Level Reading: Current data value measured by the noise sensor, including weighting method display. E-mail：info@crysound.com Web: www.crysound.com...
  • Page 64 Heater: If available, you can control its operation to lower the humidity on the microphone surface. 16. Automatic Time Calibration The automatic time calibration function is used for calibrating the time of the sound level meter. In the automatic time calibration settings, you can enable E-mail：info@crysound.com Web: www.crysound.com...
  • Page 65 Communication Method (Not Available) 18. Monitoring Settings Monitoring settings are used to configure monitoring APP, calculate periods for Ld and Ln, and set the data storage mode for the monitoring APP. E-mail：info@crysound.com Web: www.crysound.com...
  • Page 66 (Storage Path: Card/DATA/Monitor/yyyy-mm-dd-minutes.csv) Individually Store Hourly Data: Store data in CSV files with one group data hour; (Storage Path: Card/DATA/Monitor/yyyy-mm-dd-hours.csv) 19. Display Refresh Settings Configure the refresh settings for the data collected by the sound level meter. E-mail：info@crysound.com Web: www.crysound.com...
  • Page 67 Spectrum Refresh Time: If a spectrum graph is displayed in the "Main Interface - Measurement Data Area," this refresh frequency applies; c. Sampling Interval: Set the data collection frequency. 20. Over-limit Audio Upload Settings This function is for setting the upload address for over-limit audio during third-party development. E-mail：info@crysound.com Web: www.crysound.com...

  • Page 68: Data Export Instructions

    Monitoring data from the sound level meter can be exported to a PC via an SD card. To do this, open the DATA folder on the SD card, which contains the following files; each folder corresponds to a specific function APP. Fig 6.77 Data from Various Sound Level Meter APPs E-mail：info@crysound.com Web: www.crysound.com...

  • Page 69: Instrument Settings

    Analyzer APP Minute/Hour:Leq,L5,L10,L50,L90,L95,LMax,LMin,SD Monitoring APP General:L5,L10,L50,L90,L95,Lxy,LxyMax,LxyMin,Lxyeq,SD Here, x denotes the frequency weighting (A, C, Z), and y denotes the time weighting (F, S, I). 6.5. Instrument Settings The settings APP provides functions such as wireless network connection, E-mail：info@crysound.com Web: www.crysound.com...

  • Page 70: Wireless Network

    Select the desired Wi-Fi item from the list and enter the correct password in the pop-up window to connect. Successfully connected Wi-Fi will show under "Connected WLAN" (only the most recently connected Wi-Fi name is retained). E-mail：info@crysound.com Web: www.crysound.com...

  • Page 71: Bluetooth

    Enter the Bluetooth settings, toggle the Bluetooth switch on, and the device will automatically begin scanning. Click the corresponding device to pair (currently, Bluetooth only supports Bluetooth printing functionality). 6.5.3. GPS GPS Switch Location Information Fig 6.81 GPS Positioning Interface E-mail：info@crysound.com Web: www.crysound.com...

  • Page 72: Ethernet Settings

    Dynamic Acquisition: After opening the Ethernet, when the device is connected to a valid network cable, it will automatically acquire an IP and refresh the displayed information, showing the status as "Connected." 2. Static IP: After opening the Ethernet, click "Edit" to enter the network E-mail：info@crysound.com Web: www.crysound.com...

  • Page 73: Display Settings

    Fixed Mode: The device displays at a user-defined brightness continuously. d. Energy Saving Mode: The device will turn off the screen after 3 minutes of inactivity; tapping the screen will turn it back on. E-mail：info@crysound.com Web: www.crysound.com...

  • Page 74: Time & Date

    Network Time: Ensure the device is connected to a network (non-static) to obtain current time information from the selected server. GPS Time: Ensure that the GPS function is successfully enabled and available, then click the button to start calibration. E-mail：info@crysound.com Web: www.crysound.com...

  • Page 75: Language

    Chinese and English. 6.5.8. Storage Space CPU Usage Display,Memory Usage DisplayCPU Used Space of Sound Level Meter Memory Card,Remaining Capacity Display Sound Level Meter Log Operations Fig 6.86 Sound Level Meter Storage Overview and Log Operations E-mail：info@crysound.com Web: www.crysound.com...

  • Page 76: Installation & Authorization

    SD card. Send this file to our technical personnel. 2. Install: Upgrade the APP version by storing the installation package in the root directory of the SD card, then click the install button and select the desired upgrade package. E-mail：info@crysound.com Web: www.crysound.com...

  • Page 77: Device Mode

    Save the system upgrade package provided by the manufacturer into the root directory of the SD card and insert it into the CRY2851. 2. Enter the “ About ” interface, click “ System Upgrade, ” and select the E-mail：info@crysound.com Web: www.crysound.com...

  • Page 78: Peripheral Introduction And Use

    3 seconds to turn off the printer; the working status indicator will go out. Paper Feed: Press and hold the paper feed button Fig 6.90 Print Data to automatically feed the paper. 2. Sound Level Meter Operation E-mail：info@crysound.com Web: www.crysound.com...

  • Page 79: Na43 Outdoor Protection Device Usage

    The device features one input interface and two output interfaces, with input via a standard BNC interface on the front panel. The gain is approximately 39.5 dB, capable of outputting a peak DC signal of 800V and a peak AC signal of 90V. E-mail：info@crysound.com Web: www.crysound.com...
  • Page 80 6.6.2.2. Static Excitation Operation Connection Cables Fig 6.93 Static Fig 6.94 Electrical Fig 6.95 Ground Wire Excitation Signal Cable Signal Output Cable E-mail：info@crysound.com Web: www.crysound.com...
  • Page 81 Click the “Monitoring” APP on the sound level meter interface, find the “Static Excitation Calibration ” option in the settings column, and perform the following operations: a. Click the “Monitoring” APP to enter the monitoring interface. b. Click the settings button at the bottom of the monitoring interface. E-mail：info@crysound.com Web: www.crysound.com...
  • Page 82 “Waiting for Readings to Stabilize” → “Self-Test in Progress.” If the self-test passes, a prompt box will appear indicating “Self-Test Passed. ” This action can also be completed remotely via a communication protocol, saving on-site calibration labor resources. E-mail：info@crysound.com Web: www.crysound.com...

  • Page 83: Appendix 1: Microphone Performance Parameters

    Frequency 1250 1600 2000 2500 3150 4000 (Hz) Frequency -0.1 -0.1 -0.2 Response (dB) Frequency 5000 6300 8000 10000 12500 16000 (Hz) Frequency -0.2 -0.3 -0.3 -0.4 -0.2 +0.2 Response (dB) Frequency 20000 (Hz) Frequency Response (dB) E-mail：info@crysound.com Web: www.crysound.com...
  • Page 84 E-mail：info@crysound.com Web: www.crysound.com...

  • Page 85: Appendix 2: Windshield Response Correction

    8912 9441 10000 (Hz) Z-weighting -0.2 -0.1 -0.2 -0.2 Frequency 10593 11220 11885 12500 13335 14125 (Hz) Z-weighting -0.4 -0.2 -0.3 -0.5 -0.4 -0.4 Frequency 14962 16000 16788 17783 18836 20000 (Hz) Z-weighting -0.5 -0.6 -0.8 -1.1 E-mail：info@crysound.com Web: www.crysound.com...

This manual is also suitable for:

Cry2851Cry2850 series

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