Acoustics and Psychoacoustics, Fourth Edition by David Howard, Jamie Angus

By David Howard, Jamie Angus

The acoustics of an area could have a true effect at the sounds you create and seize. Acoustics and Psychoacoustics provides an important grounding and realizing to how actual track sounds behave in numerous areas no matter if in the course of a functionality or a recording and the way they're perceived by means of performers and listeners. With their transparent and straightforward sort Howard and Angus stroll you thru the speculation- the technology of sound engineering and tune creation, the acoustics of musical tools, how we listen musical sounds, and the sensible- tips to use it on track areas to create specialist sound. Real-world examples and audio clips to paintings with are supplied, delivering functional fabrics to paintings with. the recent variation uncovers the acoustic software for modern day recording undefined. The accompanying CD offers audio examples to assist readers achieve a transparent realizing of the numerous suggestions mentioned within the booklet the web site is filled with audio clips, questions and solutions, a calculation facility in addition to hyperlinks and assets.

* Acoustics and psychoacoustics lined from a musical viewpoint to aid these interested in tune expertise and song comprehend sound and the way we listen it in addition to how the acoustics of areas have an effect on sound transmission and recording areas * New content material comprises encompass sound criteria, MP3/ AAC coding, fundamentals of audiometric size, mosquito "teen scarers" * helping web site with audio clips, recorded sound, illustrates recommendations

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Extra resources for Acoustics and Psychoacoustics, Fourth Edition

Example text

An example would be a tube or pipe which is open at both ends. 36. Like the hard reflecting boundaries the minimum frequency for a standing wave occurs when there is precisely half a wavelength between the two boundaries, and at all subsequent multiples of this frequency. 35 can also be used to calculate the standing wave frequencies for this boundary arrangement. 34 The pressure and velocity components of a standing wave between two hard boundaries. 35 The pressure components of a standing wave between two bound–unbound boundaries.

In these situations the result can be expressed as a multiplication, and so can be expressed as a summation of decibel values. In other words, decibels can be added when the underlying sound level calculation is a multiplication. 11 Calculate the increase in signal level when two vocalists sing together, one at 69 dB and the other at 71 dB SPL. 29) 2 We must substitute the pressure squared values that the singers’ SPLs represent. 1 dB  10 log10    4  1010 Note that the combined sound level is only about 2 dB more than the louder of the two sounds and not 69 dB greater, which is the result that would be obtained if the SPLs were added directly in decibels.

There are several acoustical situations which can cause interference effects. 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. A less obvious situation is when there is a single sound source spaced away from a reflecting boundary, either bounded or unbounded. 28. 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.

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