The AA-175 Audiometric Analyzer is a microprocessor controlled analyzer that accurately and conveniently verifies the calibration and performance of audiometers. 

This analyzer is compatible with all Quest Sound Level Meter based Audiometer Calibration systems plus Sound Level Meter based systems from other manufacturers.

The operation of the AA-175 is automatic. The operator need only select the desired test and operate the audiometer and the keyboard to calibrate the audiometer. There are no filters to tune, no levels to adjust, and no calculations to make.

For pricing and availability information regarding the purchase, service,

AA-175 Technical Specifications

Input Voltage:
From SLM: 0.5 to 2.0Vrms (0.16 to 0.63Vrms with 10dB boost)

Input Impedance:
0.01 mF in series with 100 Kohms

Frequency:
Measures from 25 Hz to 12 kHz.
Accuracy: 0.01% +/- 1 count

Linearity:
Accuracy: +/-0.1 dB. System accuracy is primarily dependent on the SLM attenuator

Distortion:
From 250 Hz to 8000 Hz; Range is 15 to 50 dB down (approximately 18% to 0.3% THD).
At 125 Hz: Range is 15 to 33 dB down (approximately 18% to 2.2% THD).
Harmonics above 20,000 Hz are suppressed. Accuracy: +/-2 dB

Rise/Fall Time:
Accuracy: 1 cycle +/-1 msec. From 5 msec to 1999 msec

Pulse Width:
Accuracy: 2 cycles +/-1 msec. From 20 msec to 1999 msec

Overshoot:
Accuracy: +/-0.1dB

Output:
For printer: 2 wire, serial data per RS-232

Power:
(2) NEDA 1604A 9-volt alkaline, approximately 10 hours continuous use
External Power Model 65 Power Pack (Provides 6.3 VAC @ 500mA)

Temperature:
Operating: 15°C to 35°C
Storage: -10°C to +50°C

Humidity:
0 to 95%, R.H.

Size:
3.25” x 7” x 6.25” (83 x 175 x 160 mm)

Weight:
1.75 lbs (800 g)