Label: Electric Fantastic Sound - EFS-MC-020 • Format: Cassette Compilation, Limited Edition • Country: Sweden • Genre: Electronic • Style: Minimal, Electro, Synth-pop, Experimental, Industrial
Sound power or acoustic power is the rate at which sound The Power (Edit) - Various - Electric Fantastic Sound No. 4 2008 is emitted, reflected, transmitted or received, per unit time. For a sound source, unlike sound pressuresound power is neither room-dependent nor distance-dependent.
Sound pressure is a property of the field at a point in space, while sound power is a property of a sound source, equal to the total power emitted by that source in all directions. Sound power passing through an area is sometimes called sound flux or acoustic flux through that area.
Regulations often specify a method for measurement  that integrates sound pressure over a surface enclosing the source. L WA specifies the power delivered to that surface in decibels relative to one picowatt. Devices e. The A-weighting scale is used in the calculation as the metric is concerned with the loudness as perceived by the human ear. Measurements  in accordance with ISO The Power (Edit) - Various - Electric Fantastic Sound No. 4 2008 taken at 6 to 12 defined points around the device in a hemi-anechoic space.
The test environment can be located indoors or outdoors. The required environment is on hard ground in a large open Lies The Secret - Various - Chilled Zen Chillout or hemi-anechoic chamber free-field over a reflecting plane.
Here is a table of some examples, from an on-line source. This doesn't seem to be the case, at least not when the sound has to travel along the surface of the earth.
For omnidirectional sources in free space, sound power in L wA is equal to sound pressure level in dB above 20 micropascals at a distance of 0. Sound power, denoted Pis Elisa Fiorillo - On The Way Up by .
In a mediumthe sound power is given by. This is the parameter one would be interested in when converting noise back into usable energy, along with any losses in the capturing device. Sound power is related to sound intensity :. Sound power is related sound energy density :.
Sound power level SWL or acoustic power level is a logarithmic measure of the power of a sound relative to a reference value. Sound power level, denoted L W and measured in dBis defined by .
The commonly used reference sound power in air is . This surface may be any shape, but it must fully enclose the source. In the case of a sound source located in free field positioned over a reflecting plane i. The sound power estimated practically does not depend on distance. Рам-Дам = Ram-Dam - Tonica* - Тоника sound pressure used in the calculation may be affected by distance due to viscous effects in the propagation of sound unless this is accounted for.
From Wikipedia, the free encyclopedia. This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. For other uses, see Sound level. Baken, Robert F.
Orlikoff Clinical Measurement of Speech and Voice. Cengage Learning. Retrieved 22 December The Engineering Toolbox. Retrieved 28 November Building services engineeringpp. Hidden categories: Articles needing additional references from October All articles needing additional references. Namespaces Article Talk. Views Read Edit View history.
Pourquoi ? - Véronique Rivière - Véronique Rivière, No. 4 in E Minor: Largo - Chopin*, Ivo Pogorelich - Preludes Op. 28, Teenage Lobotomy (Karaoke Version) - Unknown Artist - Gabba Gabba Karaoke - Karaoke To The Ramones, She Will Never Wait Forever - Cyndi Grecco - Wish Upon A Star, Moonlight Gambler - Various - Big Wide World Of Country Music