Audio test software features speech intelligibility measurement

28th March 2018
Posted By : Lanna Cooper
Audio test software features speech intelligibility measurement

Audio Precision announced the addition of a new speech intelligibility measurement option for APx500 audio test software based upon the ABC-MRT speech processing algorithm. Measuring speech intelligibility is an important capability for engineers designing and validating a wide range of communication systems, products and components, especially those related to public safety (e.g., police, fire, emergency) where intelligibility is critically important.

Importance of speech intelligibility
The purpose of communication systems is to transmit information via speech. As such, the intelligibility - or comprehensibility - of the transmitted speech is of utmost importance. One of the more precise definitions of intelligibility is the proportion of speech items (words and/or speech sounds) uttered by a talker, and sent via a communication system, that can be recognised by the listener.

Introduction to ABC-MRT
ABC-MRT, or Articulation-Band Correlation Modified Rhyme Test, was developed by the Institute for Telecommunication Sciences (ITS) of the United States National Telecommunications and Information Administration (NTIA). It follows the paradigm of the Modified Rhyme Test, a technique for assessing speech intelligibility that involves subjective assessment by human subjects as detailed in ANSI/ASA Standard S3.2.

To eliminate the time, complexity, and expense of the traditional human subject-based methodology, ABC-MRT uses a form of Automatic Speech Recognition (ASR) to conduct an automated measurement that is closely correlated - greater than 95% - to a Modified Rhyme Test. An added benefit of ABC-MRT is its use of real speech (English only), allowing it to support the testing of systems that use noise suppression and/or codecs that only pass speech

Integrated audio, electro-acoustic and intelligibility measurement
Using the ABC-MRT option allows developers to measure the speech intelligibility of their designs with AP’s industry-leading instrumentation and use that same equipment for the rest of their audio and electro-acoustic test requirements. Once installed, the ABC-MRT measurement can be easily incorporated into any test sequence.

“For designers and developers needing perceptual audio test capabilities, whether measuring quality or intelligibility, AP offers a wide range of options,” said Dave Schmoldt, Audio Precision Chief Executive Officer.

“From PESQ and POLQA quality measurements to STI, and now ABC-MRT, intelligibility measurements, APx can meet their needs for analogue, digital, electro-acoustic and perceptual audio test.”

The ABC-MRT software option (APX-SW-ABC-MRT) is available now and retails for $2,100. It requires APx500 audio measurement software release v4.5.2 (or later) and is compatible with all analysers in the APx500 Series.

Downloads


You must be logged in to comment

Write a comment

No comments




Sign up to view our publications

Sign up

Sign up to view our downloads

Sign up

Girls in Tech | Catalyst | 2019
4th September 2019
United Kingdom The Brewery, London
DSEI 2019
10th September 2019
United Kingdom EXCEL, London
EMO Hannover 2019
16th September 2019
Germany Hannover
Women in Tech Festival 2019
17th September 2019
United Kingdom The Brewery, London
European Microwave Week 2019
29th September 2019
France Porte De Versailles Paris