Ottometrics A450 User Manual

Pc-based audiometer

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Otometrics Madsen A450

User Guide

Doc. No.7-50-1830-EN/02

Part No.7-50-18300-EN

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Summary of Contents for Ottometrics A450

Page 1 Otometrics Madsen A450 User Guide Doc. No.7-50-1830-EN/02 Part No.7-50-18300-EN...
Page 2 © 2017, 2017 GN Otometrics A/S. All rights reserved. ® Otometrics, the Otometrics Icon, AURICAL, MADSEN, ICS and HORTMANN are registered trademarks of GN Otometrics A/S in the U.S.A. and/or other countries. Version release date 2017-03-20 (153952) Technical support Please contact your supplier. Otometrics - Otometrics Madsen A450...
Page 3: Table Of Contents
User Guide Table of Contents Device description Intended use Unpacking Installation Connecting accessories to Otometrics Madsen A450 Powering the device Connecting Otometrics Madsen A450 to OTOsuite Control panels and On-screen controls Toolbar icons in the Audiometry Module 10 PC keyboard controls...
Page 4 Otometrics - Otometrics Madsen A450...
Page 5: Device Description
1 Device description Device description Otometrics Madsen A450 is a PC-controlled audiometer for testing a per- Otometrics Madsen A450 son's hearing. The audiometer is operated from the OTOsuite Audiometry Module PC software. • With Otometrics Madsen A450 you can perform all standard audi- ometric tests, tone and speech audiometry and special tests.
Page 6: Unpacking
Otometrics Madsen A450 is fully assembled on delivery, and you simply have to connect cables. Caution To connect Otometrics Madsen A450 to the PC, use the supplied USB cable. The cable length • must not exceed 3 m (approx. 10 feet).
Page 7: Connecting Accessories To Otometrics Madsen A450
PC, and equipment connected to the line in and the line out sockets of Otometrics Madsen A450. General warning notes ► 35 See also For a detailed description of the connection panel, see the Otometrics Madsen A450 Reference Manual. Otometrics - Otometrics Madsen A450...
Page 8: Powering The Device
When you connect other electrical equipment to Otometrics Madsen A450, remember that equipment that • does not comply with the same safety standards as Otometrics Madsen A450 can lead to a general reduction in the system's safety level. Connecting an external speaker External speakers can be connected to Otometrics Madsen A450 via powered output terminals or line-out terminals.
Page 9: Connecting Otometrics Madsen A450 To Otosuite
To connect Otometrics Madsen A450 to the mains supply, plug the mains plug into the wall mains outlet. To disconnect Otometrics Madsen A450 from the mains supply, pull the mains plug out of the wall mains outlet. Do not position the unit so that it is difficult to pull the mains plug out of the wall mains.
Page 10: Control Panels And On-Screen Controls
Masking Options right-click menu. Click to enable or disable selections of your choice. Tone testing Test ear selection • Right Both • Left • Transducer selection Phones • Air conduction (standard headphones), optional Otometrics - Otometrics Madsen A450...
Page 11 • noise Pulsed • Test type selection • (audiogram threshold curve) • (Speech Recognition Threshold) • (Word Recognition Score) • (Most Comfortable Loudness level) • (Uncomfortable Loudness level) Speech testing Test ear selection Right • Otometrics - Otometrics Madsen A450...
Page 12 Recorded stimulus Talk Forward Talk Forward Click to open the dialog. See the Otometrics Madsen A450 Reference Manual. Talk Forward Enables communicating with the patient in the sound booth. This will display the dialog box, where you can control the talk forward microphone sensitivity and the output level (in dB HL) to the patient.
Page 13 Test Selector Test Selector Click to open the dialog. See the Otometrics Madsen A450 Reference Manual. The Control Panel right-click menu Right-click on the buttons in the control panel to view the right-click menu. Click to enable or disable selections of your choice.
Page 14 On-screen controls Silence Mode • To enable silence mode, select > > > > > > • To change the level and frequency by more than one click at a time, use the mouse scroll wheel. Otometrics - Otometrics Madsen A450...
Page 15: Toolbar Icons In The Audiometry Module
Click to select the perspective of the patient's ears as presented on entation the screen for graph and table views. You can also select the location of the stimulus control. View Manual entry > Click to create an audiogram manually. Otometrics - Otometrics Madsen A450...
Page 16: Pc Keyboard Controls
2. It is best to clip the insert earphone transducers behind the child or on the back of their clothing and then fit the foam eartip into the child's ears. Bone Oscillator Note • For unmasked bone thresholds, you can store binaural data: Both Ear Selection - Select in the part of the control panel. Otometrics - Otometrics Madsen A450...
Page 17: Performing Tone Audiometry
The environment in which sound-field audiometry is performed may affect the sound field near the patient. The performance of loudspeakers for Otometrics Madsen A450 was tested by Otometrics under free-field conditions in a large anechoic chamber. Sound pressure level, frequency response and distortion were measured by a microphone placed 1 m from the front of the speaker.
Page 18 Whenever the test buttons and other functions are used, you can use the corresponding keys on the keyboard, or the on- screen controls located at the top of the screen or in the Control Panel to the left. For detailed examples of audiometric testing, see the Otometrics Madsen A450 Reference Manual. Tone 1.
Page 19: Performing Speech Audiometry
Whenever the test buttons and other functions are used, you can use the corresponding keys on the keyboard, or the on- screen controls located at the top of the screen or in the Control Panel to the left. For detailed examples of audiometric testing, see the Otometrics Madsen A450 Reference Manual. Speech 1.
Page 20 If an external playback device is used to generate speech stimuli via the line input of Otometrics Madsen A450, only a high quality CD player or similar device should be used; tape recordings may not provide a sufficient signal to noise ratio.
Page 21: Service, Cleaning And Calibration
14 Service, cleaning and calibration Service, cleaning and calibration Warning Under no circumstances disassemble Otometrics Madsen A450. Contact your supplier. Parts inside Oto- • metrics Madsen A450 must only be checked or serviced by authorized personnel. 14.1 Cleaning The device •...
Page 22: Other References
For instructions on installing OTOsuite, see the OTOsuite Installation Manual, which you can find on the OTOsuite install- ation medium (disk or memory stick). Technical specifications Type identification Otometrics Madsen A450 is type 1081 from GN Otometrics A/S. Channels Two separate and identical channels. Frequency range Insert earphones: Standard frequencies: 125 - 8000 Hz...
Page 23 4000 6000 8000 9000 10000 11200 12500 Attenuator setting to N/A* obtain 80 dB SPL This table indicates the attenuator settings required to obtain a sound pressure level of 80 dB SPL at indicated frequencies. Otometrics - Otometrics Madsen A450...
Page 24 250 to 4000 Hz: ±4 dB The reference conditions for the specification of frequency response and sound pressure level depend on the type of audi- ometer. Otometrics Madsen A450 can be calibrated as either a “corrected” (Type AE) or “uncorrected” (Type A) speech audiometer: Type AE calibration: •...
Page 25 6000 8000 Distortion of signals occurs for higher stimulus levels. Otometrics Madsen A450 complies with IEC and ANSI standards with respect to maximum distortion. The following specification from IEC 60645-1:2001 applies: Specification of allowable distortion levels for airborne sound (test level and distortion)
Page 26 • External amplifier using the line output. Transducer options depend on how Otometrics Madsen A450 is ordered and calibrated. 1. All headbands supplied with transducers comply with the ISO 389 series for that model of transducer unless oth- erwise specified.
Page 27 2 x 2 mono jacks, 6.3 mm (1/4 inch) 1 x mono jack, 6.3 mm (1/4 inch) Speaker for SF power output and Coun- 3 x terminals, Ω seling and Simulations: 3 x 40 W peak, 8 load SF line output: 2 x 1.6 Vrms, Otometrics - Otometrics Madsen A450...
Page 28 Additionally, Otometrics Madsen A450 includes a feature which allows the operator to select the maximum output level from a bone oscillator . Using this feature, the maximum output may be set lower than the physically available output level (installation option).
Page 29 -20°C to +60°C (-22°F to 140°F) Air humidity: 10% to 90%, non-condensing Air pressure: 500 hPa to 1060 hPa Operating environment Mode of operation: Continuous Temperature: +15°C to +35°C (59°F to 95°F) Air humidity: 30% to 90%, non-condensing Otometrics - Otometrics Madsen A450...
Page 30 Should be extended if Otometrics Madsen A450 has been stored in a cold environment. • Disposal Otometrics Madsen A450 can be disposed of as normal electronic waste, according to WEEE and local regulations. Dimensions Otometrics Madsen A450: Approx. 279 x 196 x 54 mm, (10.0 x 7.7 x 2.1 inches)
Page 31 Guidance and manufacturer's declaration - electromagnetic emissions for all equipment and systems Otometrics Madsen A450 is intended for use in the electromagnetic environment specified below. The user of Otometrics Madsen A450 should ensure that it is used in such an environment.
Page 32 Guidance and manufacturer's declaration - electromagnetic immunity - for equipment and systems that are NOT life-supporting Otometrics Madsen A450 is intended for use in the electromagnetic environment specified below. The user of Otometrics Madsen A450 should ensure that it is used in such an environment.
Page 33 TV broadcast cannot be predicted theoretically with accuracy. To assess the electromagnetic environment due to fixed RF transmitters, an electromagnetic site survey should be considered. If the measured field strength in the location in which Otometrics Madsen A450 is used exceeds the applic- able RF compliance level above, the Otometrics Madsen A450 should be observed to verify normal operation.
Page 34: Definition Of Symbols
This manual contains information and warnings, which must be followed to ensure the safe performance of the devices and software covered by this manual. Local government rules and regulations, if applicable, should also be followed at all times. Definition of symbols ► 34 Connector warning notes ► 35 General warning notes ► 35 Otometrics - Otometrics Madsen A450...
Page 35 1. This class of equipment is allowed in domestic establishments when used under the jurisdiction of a health care pro- fessional. 2. Otometrics Madsen A450 is intended for diagnostic and clinical use by audiologists and other trained health care pro- fessionals in testing the hearing of their patients.
Page 36 Many types of electrical devices, e.g. mobile telephones, may generate radio fields. We recommend that the use of such devices in the vicinity of Otometrics Madsen A450 be restricted. Likewise, we recommend that the instrument is not used in the vicinity of devices sensitive to electromagnetic fields.
Page 37: Manufacturer
The equipment is used in accordance with the instructions for use. The manufacturer reserves the right to disclaim all responsibility for the operating safety, reliability and performance of equipment serviced or repaired by other parties. Otometrics - Otometrics Madsen A450...
Page 38 19 Manufacturer Otometrics - Otometrics Madsen A450...