Frequencies & Intensities:

Attenuators:
Independent attenuators  for Ch1 & Ch2 from -10 to 120dB HL in 1 or 5dB steps.
Outputs:
Left AC, Right AC, Bone L+R, FF1,FF2, FF1+2, Insert, HF
Inputs:
Tone, Warble Tone, Mic, Tape
Display:
Alphanumeric Transflective
Supertwist Back-lit 2x20 LCD
VU Meter:
Monitors speech by two10 segment 2 color LED arrays. 
Tone presentation:
Manual, REV, SIM, ALT, Pulse Single pulse (100-5000ms)  
Signal Switch:
Two independent silent touch switch for signal presentation.

Masking Stimulus:
Automatic selection of NB. for Tone and WN. or SN. for Tape or Live Speech presentation.
Free selection of NB. SN. WN. Automatic contralateral mask. Modulation:
Warble +/- 5% , 5Hz.
Synchronization:
Interlocks both attenuators of Ch1 & Ch2 with Sync.dB . Selects same frequencies on both channels by Sync.F .
Auto Threshold:
Patient controlled Hughson Westlake test after ISO 8253-1.
Bekesy:
Pure tone & NB stimulation Continuous or pulsed tone
SISI:                                           Auto score calculating.0dB & 5dB included for familiarization 
TTD:                                      Auto calculation of decay time  Auto dB increment (PC.TTD) 
ABLB:
Adjustable pulse length & number of pulses (1 to 20)
Also alternative output can be
selected manually by ALT.
MLB:
preset-able four frequency pairs with auto-store function
Stenger:
Binaural pure tone or speech available by selecting SIM.
Langenbeck:
Tone in noise can be produced by selecting similar out-puts and Mask on CH2
Tinitus:
Multi frequency with 62.5Hz steps can be used for Tinitus test by selecting Multi F.
HF:
High frequencies from 8k to 18k can be produced on HF Phones by selecting HF mode.
Speech presentation:
Using Tape or Mic inputs, the rate of correct / incorrect answers displays in percent. 
Communication:
Talk forward: adjustable 50-110dB SPL on both ears via built-in MIC

Talk-back: internal speaker (microphone input and level adjustment on rear panel)
Monitoring:
Monitors channels by Mon(1, 2) one by one or simultaneously. Computer interface:
The RS232C I/O port allows on-line communication computer and audiometer. The AC9 soft ware provides, Monitoring, storage and print-out  of all results on A4 pages as multi-test, color Audiogram. 
Calibration:
AC ISO 389-1(TDH39)               ISO 389-2 (Ear-tone 3A) 
BC ISO 389-3 (A20)
Calibration performed via 
operating panel, stored on 
EEprom (no battery backup 
of memory required).
Dimensions:
52.5x15x 40 cm. (WxHxD) 7kg.
Power:
AC 50/60 Hz. 220v. 40w
Construction:
Painted metal cabinet.
Airfreight Packing:
Dimensions: 55x17x65 (WxHxD).
Gross weight: 11 kg. 

Included Accessories:
TDH39 or EU9 standard headset.
A20 or B71 Bone Conductor.
Microphones for speech.
Microphone for talk back.
Patient Response switch. Computer connection cable.
General software (1 CD)
Power Cable.
Dust cover
Additional Accessories:
AS9 free field loudspeaker.
Ear-tone 3A insert phone 
HF Audiometric head-set
Jack panel link cable