New PDF release: Acoustics and Hearing

By Peter Damaske

ISBN-10: 3540782273

ISBN-13: 9783540782278

Should you take heed to track at domestic, you ought to have an acoustic influence with regards to being within the live performance corridor. this is often completed by way of a complicated two-loudspeaker procedure and digital dealing with of the indications. easy methods to head-related sound replica and reception to get the unique effect is defined during this complete e-book at the outer impression of listening to and the way to accomplish excellent stereo results. The e-book additionally introduces a conception of flow thresholds.

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Extra resources for Acoustics and Hearing

Sample text

Crossover network and sum-signal The reason the signal has to be split and recombined will be considered later. Instead, we will discuss the problems that result from this procedure. If a sinusoidal voltage of the frequency f is applied to an analog filter, the phase of the output signal will be shifted by an angle ϕ(f ). In principle this might cause problems when the components are recombined. However, the filters actually realized are of the Butterworth type [27]. Since they both have the order four and equal cut-off frequencies, we have a simple phase relation.

Both Figs. 3 concern the Haas effect, but the delayed sound component arrives from quite different directions in the horizontal plane. In both cases the delayed sound is very powerful, and yet the directions sub- 50 2 Powerful Onset of Reverberation jectively perceived can be assigned to the two objective sound components in equal parts. ” Of course, the answers are again statistically distributed. However, the grey spots in the figures are meant to indicate only the centres of these distributions.

We can thus realize that Fig. 23 describes only the transmission in the living room, but not the recording from the garden. This important point—that the general tendency of the curve does not depend on the signal—can be demonstrated as well as exploited experimentally. We can restrict the discussion to the lower part of Fig. 22 and present 1/3 octave band noises from a test CD to the dummy head in the living room [13]. The essential transmission curve can thus be checked, possible errors can be detected, and the final adjustment of the equalizer can be revised.

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Acoustics and Hearing by Peter Damaske


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