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Hearing Instrument Testing (HIT) measures the hearing instrument response in a 2cc
coupler in the test chamber. The coupler response is then compared to the
manufacturer specification to ensure quality performance or to detect possible
malfunctions of the hearing instrument.
This system follows the ANSI S3.22 and IEC 60118-7 standards for hearing aid
measurement methods.
The Avant HIT+ supports the following measurements:
OSPL-90
Frequency Response
Input/Output (AGC)
Induction Coil
Full on Gain
Equivalent Input Noise
Battery Current
Reference Test Gain
Harmonic Distortion
Attack/Release
This manual assumes that the system hardware, software and drivers are installed
and working properly. Please refer to the MedRx Avant HIT+ Installation Manual for
assistance.
Getting to Know
Your AVANT HIT+
Intended Use Statement:
The MedRx AVANT HIT device is an acoustic chamber that utilizes loudspeakers and
measurement microphones for verification of overall performance of hearing aids
for adults and children. The measurements are made without the hearing instrument
being worn. These devices are to be operated by professionals with education
and/or training in the field of audiometry.
Indication for Use Statement:
The Avant HIT Chambers are for use by professionals with education and/or training
in the field of audiometry to evaluate the overall performance of hearing aids for
adults and children utilizing loudspeakers and measurement microphones. The
measurements are made without the hearing instrument being worn.
The AVANT HIT+ represents a new era of precision Hearing Instrument Testing for
your office. Compact yet rugged, this PC-Based system is USB powered and performs
all required ANSI and IEC tests. The following section of this manual will familiarize
you with the physical features and accessories of the HIT+ system
.
