Skip to main content

Joint Acoustic and Modulation Frequency

Abstract

There is a considerable evidence that our perception of sound uses important features which is related to underlying signal modulations. This topic has been studied extensively via perceptual experiments, yet there are few, if any, well-developed signal processing methods which capitalize on or model these effects. We begin by summarizing evidence of the importance of modulation representations from psychophysical, physiological, and other sources. The concept of a two-dimensional joint acoustic and modulation frequency representation is proposed. A simple single sinusoidal amplitude modulator of a sinusoidal carrier is then used to illustrate properties of an unconstrained and ideal joint representation. Added constraints are required to remove or reduce undesired interference terms and to provide invertibility. It is then noted that the constraints would also apply to more general and complex cases of broader modulation and carriers. Applications in single-channel speaker separation and in audio coding are used to illustrate the applicability of this joint representation. Other applications in signal analysis and filtering are suggested.

Author information

Affiliations

Authors

Corresponding author

Correspondence to Les Atlas.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Atlas, L., Shamma, S.A. Joint Acoustic and Modulation Frequency. EURASIP J. Adv. Signal Process. 2003, 310290 (2003). https://doi.org/10.1155/S1110865703305013

Download citation

  • Received:

  • Revised:

  • Published:

  • DOI: https://doi.org/10.1155/S1110865703305013

Keywords

  • Digital signal processing
  • acoustics
  • audition
  • talker separation
  • modulation spectrum