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When the gain on a sound amplification system is turned too high, the output from the loudspeaker changes to an unpleasant, loud, usually high-pitched sound. ... In the development of a simplified model for a sound amplification system, a starting assumption is that the sound drops off according to the inverse square law.
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hyperphysics.phy-astr.gsu.edu/hbase/Audio/fback.html
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Amplifier - Wikipedia, the free encyclopedia
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Generally, an amplifier or simply amp , is any device that changes, usually increases, the amplitude of a signal. The relationship of the input to the output of an amplifier—usually expressed as a...
en.wikipedia.org/wiki/Amplifier
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PARABOLIC AND SHOTGUN MIC SOUND SYTEMS! Amazing sound amplification! ... WIDE SELECTION OF AMAZING SOUND ; AMPLIFICATION SYSTEMS AND MICROPHONES...
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www.pimall.com/nais/e.sound.html
www.pimall.com/nais/e.sound.html
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Sound amplification is the job of a group of tiny bones inside the middle ear. Learn about sound amplification and why sound amplification is necessary. ... Amplifying Sound ... The main amplification comes from the size difference between the eardrum and the stirrup. The eardrum has a surface area of approximately 55...
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health.howstuffworks.com/hearing3.htm
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Classroom Sound-Field Amplification: An Audiologist's Suggestions ... When a classroom is equipped with a sound-field amplification system, the teacher's voice is transmitted from a Lavalier microphone to ceiling or wall mounted speakers, which amplify it 8 to 10 dB above ambient room noise.
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www.hear-more.com/classsuggestions.htm
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Use of a sound-field FM amplification system allows the teacher to maximize listening and learning opportunities in the classroom. Benefits are improved academic achievement, decreased distraction, increased on-task behavior, and increased attention to verbal instructions. ... Audiology Hearing Aids Speech Pathology...
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www.hear-more.com/classamplification.htm
www.hear-more.com/classamplification.htm
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Where Reality Meets Promises...
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www.asoundamplification.com/
www.asoundamplification.com/
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The Acoustical Society of America has issued a policy statement that advises schools not to use sound-amplification systems in their efforts to overcome noisy conditions in classrooms. ... While acknowledging that amplification systems have many valid uses in schools, ASA's statement ... Sound Is An Integral Part Of Products,
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www.sciencedaily.com/releases/2006/06/060615082513.htm
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Amplification of sound ... Sound can be amplified through several ways. The first one in history, was the simple cone, or bell. This is the simplest version of an amplification device, it was just a cone of wood, or paper, or almost anything.
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library.thinkquest.org/27098/MusicScienceAmplification....
library.thinkquest.org/27098/MusicScienceAmplification.shtml
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