title: Room acoustical parameters of two electronically connected rooms.
abstract: The acoustical properties of two rooms that are one-way connected electroacoustically, e.g., in a telephone/video conference, can be analyzed through the total impulse response from a source in one room to the receiver in the other room. The total impulse response is a convolution of the two involved room impulse responses, and such a model is analyzed in this paper. The room impulse response model used here facilitates convolution analysis as the model is quite simple and composed of two terms only, a direct sound term and an exponentially decaying random Gaussian noise term. Analytical expressions have been derived for the energy decay function, leading to estimates of room acoustical parameters like clarity and the modulation transfer functions for such convolved impulse responses. Background noise expressions are also introduced to allow signal-to-noise ratio studies. Estimates of acoustic parameter values have been compared with measurements to evaluate the model used and verify the results achieved.
authors.affiliation: Acoustics Research Centre, Department of Electronics and Telecommunications, Norwegian University of Science and Technology (NTNU), NO 7491 Trondheim, Norway.
authors.forename: Hassan El-Banna
authors.initials: Hel-B
authors.lastname: Zidan
authors.affiliation: Acoustics Research Centre, Department of Electronics and Telecommunications, Norwegian University of Science and Technology (NTNU), NO 7491 Trondheim, Norway.
authors.forename: U Peter
authors.initials: UP
authors.lastname: Svensson
authors.affiliation: Cisco Systems Norway AS, Philip Pedersens vei 20, 1366 Lysaker, Norway.
authors.forename: Johan L
authors.initials: JL
authors.lastname: Nielsen