Standard Sequences for Hearing Aid Test – ANSI S3.22

All the major tests from the ANSI S3.22:2014 hearing aid test standards, and some of the additional ‘Annex C’ tests

Introduction

This guide contains user instructions for the tests contained in the Hearing Aid Standard suite of sequences. These sequences include all the tests from ANSI S3.22:2014 as well as some of the additional ‘Annex C’ tests from the 2014 ANSI standard. This guide describes the basic functionality of each sequence and details the process of hardware setup and calibration.

Each test, as outlined in the standards, is contained in a single test sequence and can be run independently. The ‘— HA ANSI S3.22_2014 Product Test — master sequence’, calls all the required individual test sequences to run a complete standard test suite. It also creates or recalls a limits file according to the definitions in ANSI S3.22:2014 and assists in setting the correct Reference Test Setting for the device being tested. The name of the master sequence is bracketed by dashes to separate it from the individual test sequences.

Full Tests

• HA ANSI S3.22:2014 Product Test Sequence

Individual Tests

• OSPL90
• Full On Gain
• Battery Current – Quiescent and Max
• Battery Current
• Frequency Response
• Harmonic Distortion
• Difference Frequency Distortion
• Equivalent Input Noise – AGC 50 dB Input
• Equivalent Input Noise – One Third Octave
• Input – Output
• Attack and Release
• Telecoil – SPLITS
• Telecoil – SPLIV
• Telecoil – SPLIV FOG

Additional Tests (not run by a Full Test)

• Equivalent Input Noise – Linear 60 dB Input
• Gain and Tone Control Response
• IO and Distortion vs. Frequency
• Effect of Voltage on OSPL 90 and Frequency Response

Software Requirements

• SoundCheck 20.03 Plus or later (p/n 1102)
• Attack and Release module (p/n 2008)
• Real Time Analyzer module (p/n 2005)
• Multitone module (p/n 2020)
• Optional: Microsoft Excel for reporting

Hardware Requirements

• B&K 4232 Anechoic Test Box (or equivalent)
• B&K 4231 calibrator (or equivalent)
• 2cc coupler with ½” pressure microphone and preamplifier
• Power Amplifier – Listen AmpConnect 621 or similar
• USB controlled DC power supply – Listen DC Connect or similar
• Telephone Magnetic Field Simulator – required for ANSI S3.22 e.g., B&K 4232 Telecoil Loop or Frye Telewand p/n 043-1050-00
• Battery pill with cable
• Optional: Reference Microphone for calibration

Setup Diagram

Get Sequence

Please contact your Listen sales engineer or representative for more information and pricing on this sequence.