Austar hering aid

Home > Product > Listening Equipment

Audiometer  AD-3A

AD-3A

AD-3A audiometer is used for pure tone, speech and sound-field testing, applicable to E.N.T diagnosis, hearing instrument fitting, clinical and domestic hearing testing.

AD-3A provides 9 test points for air conduction frequency which ranges from 250HZ to 8000HZ, and has hearing level ranging from 10dB to 120dB. It adopts Standard TDH-39 headset for testing, and has built-in pure tone, noise testing signals.

Output of AD-3A: Standard headset and bone conductor.      

Use latest LCD Screen Mode to display the test result of sound pressure level (SPL), frequency, sound channel, etc.

Features of buttons on audiometer

Features of buttons on audiometer

1.Microphone (Internal)

2.A—B: Button for switching between Air Conduction and Bone Conduction.The audiometer is preset as Air Conduction when booted up.

3.SPEECH: For microphone output. It is preset as mute, when pressed, then the output of headset will be microphone signal whose initial output is 60bB, and can be adjusted in a range of -10dB-100dB. The two potentiometers are used to adjust output SPL for left and right ear respectively.

Note: You can only have access to microphone mode in Air Conduction. Press again if you want to withdraw from the mode.

4.For stepping up and down the testing tone of SPL at 2dB. (default set in 5dB )

5.To adjust SPL output intensity for left soundtrack.

6. For stepping up and down the testing tone of SPL at 5dB.

7.▼:  Used for reducing the test frequency for pure tone testing.

8. INT: Generate testing tone when pressed.

9 .▲:  Used for multiplying the test frequency for pure tone testing.

10 .Converse button for pulse signal: When pressed down, the LED screen will display several “P”, then press INT, the pulse signal comes out..

11. To adjust SPL output intensity for right soundtrack.

12. L—R: transfer switch for left and right output. Default setting is the left side output.

13. NBN: Key for activate masking noise activate, preset as mute. Press it then the LED light nearby will light on, the masking noise will come out, default set for SPL is 30dB.

14.EXTEND: Extending switch, default set in not running conduction, press it  when the sound pressure level reach 90dB, the LED light will turn on, testing tone range will change from -10dB-90dB to -10dB-110dB, the output is 20dB, press again, back to original conduction.

Note: This function is useful only when the sound pressure level reach 90dB.

15. Responder Indicator: When press the patient response switch, the indicator will light on.

16.Output Indicator at Right: The light will light on when the testing tone comes from the right sound channel.

17.Output Indicator at Left: The light will light on when the testing tone comes from the left sound channel.

 

PRODUCT
Hearing Aid Accessories Listening Equipment
ABOUT US
Company Profile Certificate Enterprise Culture
HEARING LOSS
Testimonial Hearing Aid Knowledge Hearing Knowledge
NEWS
Company News Industry News
Download
Download
FAQ
FAQ
SITEMAP

LINKS: hearing aid| Digital Hearing Aids| AST| Hearing Loss| Austar|

Copyright © AUSTAR  Hearing  Science & Technology (Xiamen) Co.,Ltd      All rights reserved