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Convention Paper

Modeling the Effects of Rooms on Frequency Modulated Tones

Authors: Smith, Sarah R.; Bocko, Mark F.

AES Convention 143 · Paper 9885 · October 2017

Abstract

This paper describes how reverberation impacts the instantaneous frequency tracks of modulated audio signals. Although this effect has been observed in a number of contexts, less work has been done relating these deviations to acoustical parameters of the reverberation. This paper details the instantaneous frequency deviations resulting from a sum of echoes or a set of resonant modes and emphasizes the conditions that maximize the resulting effect. Results of these models are compared with the observed instantaneous frequencies of musical vibrato tones filtered with the corresponding impulse responses. It is demonstrated that these reduced models may adequately reproduce the deviations when the signal is filtered by only the early or low frequency portion of a recorded impulse response.

Details

Published in
AES Convention 143
AES Convention
143
Paper number
9885
Publication date
October 6, 2017
Session subject
Applications in Audio
Affiliation
University of Rochester, Rochester, NY, USA (See document for exact affiliation information.)
Type
Convention Paper