By David Howard, Jamie Angus
I am utilizing this for a category, and it has been a superb source. occasionally i locate it a section dry, yet i am discovering such a lot of my sound recording and digital tune textbooks to be lovely dry. for instance, circumvent & Jerse's textbook on machine synthesis is great dull.
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Additional resources for Acoustics and Psychoacoustics, Third Edition (Music Technology)
Note that one cannot use the above equations on more than three boundaries because then the sound can no longer expand without bumping into something. We shall examine this 32 Introduction to sound subject in more detail in Chapter 6. However, it is possible to have directivities of greater than 8 using other techniques. For example, horn loudspeakers with a directivity of 50 are readily available as a standard product from public address loudspeaker manufacturers. 5 Sound interactions So far we have only considered sound in isolation and we have seen that sound has velocity, frequency, wavelength and reduces in intensity in proportion to the square of the distance from the source.
The obvious ones are when two loudspeakers radiate the same sound into a room, or when the same sound is coupled into a room via two openings which are separated. 24 Interference arising from reflections from a boundary. 1m less obvious situation is when there is a single sound source spaced away from a reflecting boundary, either bounded or unbounded. 24. This latter situation can often cause problems for recording or sound reinforcement due to a microphone picking up a direct and reflected sound component and so suffering interference.
This is because, although the total pressure, or velocity component, may lie anywhere between zero and the sum of the individual pressures or velocities, the energy flow of the sound waves is still preserved and so the waves continue to propagate. 14. This characteristic of sound waves is called linear superposition and is very useful as it allows us to describe, and therefore analyse, the sound wave at a given point in space as the linear sum of individual components. 2 Sound refraction This is analogous to the refraction of light at the boundary of different materials.