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Science question: How can you measure the intensity of sound? It depends on how far you are from the object that is making the sound.
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wiki.answers.com/Q/How_can_you_measure_the_intensity_of...
wiki.answers.com/Q/How_can_you_measure_the_intensity_of_sound
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Sound intensity is defined as the sound power per unit area. The usual context is the measurement of sound intensity in the air at a listener's location. The basic units are watts/m2 or watts/cm2 . Many sound intensity measurements are made relative to a ... where V1 and V2 are the measured voltage amplitudes .
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hyperphysics.phy-astr.gsu.edu/Hbase/sound/intens.html
hyperphysics.phy-astr.gsu.edu/Hbase/sound/intens.html
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The intensity of a sound wave is represented by Watts/meter^2. The amount of energy which is transported past a given area of the medium per unit of time is known as the intensity of the sound wave. The greater the amplitude of vibrations o...
http://answers.yahoo.com/question/index?qid=20080525193...
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As shown in the above illustrations, a sound originating in front of the probe will be measured as a positive intensity, whereas a sound from behind the probe will be negative...
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www.soundintensity.com/si_technical.htm
www.soundintensity.com/si_technical.htm
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With use of a three-dimensional particle velocity and pressure sensor the active sound intensity can be measured. ... The mean sound intensity can be calculated out of the product of the instantaneous pressure and particle velocity, but also out of the calculated direct pressure and direct particle velocity.
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www.aes.org/e-lib/browse.cfm?elib=11330
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Intensity is measured in watts per square metre (W m¯2). The intensity is proportional to the square of the amplitude. Sound level intensity is related to the perceived loudness of a sound, measured in decibel(dB).
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members.optusnet.com.au/scottsoftc/Chapter01/Chapter1f....
members.optusnet.com.au/scottsoftc/Chapter01/Chapter1f.htm
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The word intensity is used in a number of similar but slightly different ways. ... The intensity of sound is measured using the decibel scale.
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scienceworld.wolfram.com/physics/Intensity.html
scienceworld.wolfram.com/physics/Intensity.html
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The sound intensity level is the acoustic power of a sound per unit of area in relation to a fixed reference ... Since the sound intensity level may be difficult to measure, it is common to use sound pressure level measured in decibels instead. Doubling the Sound Pressure raises the Sound Pressure Level with 6 dB.
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www.engineeringtoolbox.com/sound-intensity-d_712.html
www.engineeringtoolbox.com/sound-intensity-d_712.html
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A sound level scale may be derived that compares the intensity of sound, I W/m², with a reference value selected as the threshold ... The fundamental property of sound is sound intensity. When compared to a reference value for the threshold of hearing, a logarithmic loudness scale may be derived, called the decibel scale.
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physics.suite101.com/article.cfm/how_loud_is_it
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