The Speech Transmission index is based on the Modulation Transfer Function. The MTF can either be measured directly in the modulation domain, as suggested by T. Houtgast and H.J.M. Steeneken, or calculated from the impulse response. The method described in this paper measured the noise-free impulse response and calculates the MTF according to the definition by M.R. Schoeder. The noise-free MTF is then corrected for the influence of noise by a measurement of the background noise.
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.