Auditory Perception of Sound Sources (Springer Handbook of by William A. Yost, Richard R. Fay

By William A. Yost, Richard R. Fay

This quantity covers the higher-level auditory techniques which are a part of animal conception. The chapters describe how people and different animals understand the sounds that they obtain from the numerous sound resources current on the planet. This ebook offers an summary of components of present learn concerned with figuring out how sound-source decision methods function. It makes a speciality of psychophysics and belief in addition to being suitable to easy auditory research.

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The role of the natural frequencies in the perception of plate shape, material, and size is discussed further in Section 6. Finally, comparing Eqs. 4), it is possible to see how the natural frequencies might also mediate the identification of source type: bar or plate. For the plate, the natural frequencies tend to be greater in number and more closely spaced than they are for the bar, this by virtue of the fact that the plate vibrates transversely in two dimensions, the bar in one. Indeed, if one excludes the degenerate case a = b, then over the bandwidth fmax − fmin occupied by the partials, the number of modes N will generally be greater for the plate.

The author thanks Dr. Douglas Keefe for many helpful comments on an earlier version of the manuscript. This work was supported by NIDCD grant R01 DC006875-01. References Avanzini F, Rocchesso D (2001) Controlling material properties in physical models of sounding objects. In: Proceedings of the International Computer Music Conference, La Habana, Cuba, pp. 17–22. Bernstein LB, Green DM (1987) Detection of simple and complex changes of spectral shape. J Acoust Soc Am 82:1587–1592. Bregman AS (1990) Auditory Scene Analysis: The Perceptual Organization of Sound.

Bottom row: Variation in amplitude for a second, higher-frequency, mode. 2. 6) where An is the amplitude of the nth partial as in Eq. 2), P is the time integral of the impact force, and the n are as given in Eq. 3b) (Morse and Ingard 1968, p. 185). Note first the relation of amplitudes to the quantities and Q associated with the material of the bar. We know that the natural frequencies grow with the ratio of these quantities (Eq. 3a]), but the amplitudes according to Eq. , iron vs. wood). For a constant applied force, the amplitudes also depend on the geometry of the bar, increasing with length l, but decreasing with cross-sectional area S and the modulus of gyration .

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