Development of circuit board scheme of screening instrument

Development of circuit board scheme of screening instrument

Description of technical parameters:

Test item: distortion product otoacoustic emission (DPOAE)

Transient otoacoustic emission (TEOAE) (optional)

Frequency range: 1.5-9kHz (2-4KHz preset)

Stimulation intensity range: 40-65dBSPL

Output: 90dBSPL

Microphone system noise: -15dBSPL@1KHZ （1hz BW）

Stimulation sampling ratio: 31.25Hz

Power supply: 6V DC, 4 AA batteries

Battery life: typical value 300 times

Probe weight: 300g (including battery)

Display: LCD 4 lines × 10 characters

Adapt to different needs

The front panel programming function allows easy switching between basic settings and user-defined settings

Change. Through the advanced setting menu, you can set the average time, test intensity, frequency and time

Time/date, etc., which makes ERO? SCAN system can adapt to different requirements.

Maico must be a boutique

·Either built-in TEOAE or DPOAE test function

·Light weight (300g), ergonomic portable design

·It is easy to use, and the test results are displayed graphically and in the way of PASS/REFER

·The test results are accurate and reliable, the test is fully automatic, and the speed is fast (typical value 7 seconds/time)

·Test results can be printed automatically within 3 seconds

·Fast, silent printer without cable connection control

·Double probe design (integrated patented probe and micro soft probe for infants)

·Test results can be uploaded to PC through RS232 interface

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