Hearing Instruments Testing Module

Hearing Instrument Testing
The hearing instrument testing module (HIT440) provides technical verification of all types of hearing aids. The system includes IEC and ANSI standards, but you can add your own tests if required.

hit440-thumb1Built-in test sequences

The HIT440 contains a number of built-in test sequences based on IEC and ANSI standards. This means the system is ready to go when you receive it.

You can customize HIT440 to suit your personal needs. Include new tests, enter data for new hearing aid models and save settings as new test flows.

Endless loop testing
For aids with suspected intermittent faults you can set up a sequence of tests, specifying tolerances for each, and run the sequence in an endless loop until a tolerance is overstepped.

Compatibility with TBS25
HIT440 also supports the external test chamber TBS25 for situations where attenuation greater than the built-in Affinity 2.0 test chamber is required.

Hearing Instrument Testing

  • Tests all types of hearing aids
  • Customizable workflow
  • Telecoil testing
  • Design your own printouts and reports


Hearing Aid Analyzer EN 60118-0, EN 60118-7, ANSI S3.22.
Stimulus Signal Warble Tone, Pure Tone, Random noise, Pseudo random noise, Band limited white noise, Chirp, ICRA, Real Speech, any other sound file (automatic calibration available).
Stimulation Intensity Range 40-100 dB SPL in 1 dB steps
Intensity accuracy ± 1.5 % dB
Stimulus Distortion Less than 1 % THD
Sweep Speed 1.5 – 12 sec
Coupler Microphone Ranges 40-145dB
Frequency Accuracy ± 1%
FF Loudspeaker Output Max 6 W into 8ohms, max 10 W into 4 ohms.
Telecoil drive in Test box 10 – 100 mA/meter
Battery Simulator Standard types are selectable, Custom types within 1.1 – 1.6 V, 0 – 25 Ohm range.
Frequency Range 100-10000Hz.
Frequency Resolution 1/3, 1/6, 1/12 and 1/24 octave or 1024 point FFT.
Test box Built-in test box holds telecoil drive as well as special dual speaker set for checking directional microphone function.
Pre-Programmed Protocols HIT module comes with a set of Test Protocols loaded. Additional Test Protocols can be designed by user, or easily imported into the system.
Compatible Software NOAH 3, OtoAccess™
Available tests IEC118, ANSI 3.22, Custom – OSPL90 – Full On Gain – Input/Output – Attack/Recovery Time – Reference Test Gain – Frequency Response – Equivalent Input Noise – Harmonic Distortion – Intermodulation Distortion – Battery Current Drain/Battery Life Time – Microphone Directionality – Coil Frequency Response – Coil Harmonic Distortion – Coil Full-On Gain Response
Included parts Affinity2.0 HIT440 CD
OtoAccess™ database CD
2CC coupler with microphone and adaptors for
ITE, BTE and Body Style HA
Coupler seal wax
Reference Microphone
Standard USB Cable
Power Cable 120 or 230V
Mouse pad
Operation and Multilingual CE Manual
Optional parts Battery Adapters BAA675, BAA13, BAA312, BAA10, BAA5
Couplers 1.2CC and 0.6CC: ITE, BTE,
Body Ear Simulator
TBS25M External Test Chamber incl. cables.
ACC60 Affinity2.0 carrying Case
Calibration Adaptor
UCO15 Optical USB Extension Cable
Other specifications – Affinity 2.0 specification
– TBS25 specification