AES E-Library

AES E-Library

An Evaluation of the Accuracy of MTF-STI Measurements by Comparison to Japanese Three-Syllable Listening Tests

Document Thumbnail

Acceptable speech intelligibility should be a fundamental and important target for every sound system designer. Speech intelligibility is affected not only by the ratio of early energy to reverberant energy, but also by the properties of each individual discrete sound arrival. Evaluation of subjective listening tests using three-syllable word lists shows clearly the effects of loudspeaker directivity, listener location in the room and the acoustic properties of the room. The comparison of the results of listening tests and measured STI values is illustrated using a best-fit logarithmic regression curve. STI values are calculated from a computer generated impulse response. Listening tests are made using a DSP implementation of the same impulse response. The comparison reveals a relationship between the impulse response shape and the STI values. These results show that speech intelligibility can be accurately predicted by MTF-STI measurements because both the time and the energy characteristics of each sound arrival are considered.

AES Convention: Paper Number:
Publication Date:

Click to purchase paper as a non-member or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!

This paper costs $33 for non-members and is free for AES members and E-Library subscribers.

Learn more about the AES E-Library

E-Library Location:

Start a discussion about this paper!

AES - Audio Engineering Society