Equalization
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Equalization - The adjustment of timbre, or tone quality, achieved by changing the amplitude of a signal at different frequencies. (Abbreviated: EQ.) Tone controls are simple forms of equalization.
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Equal loudness contours
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Equal loudness contours - A set of curves of equivalent loudness, which model the ear’s frequency response throughout the audible spectrum. The curves, obtained from actual testing, show how much more sound power is required at one frequency than another to obtain a sound of equal loudness.
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Echo
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Echo - A distinctly discernible reflection, or repetition of a source signal. Note: The term is often used incorrectly to refer to reverberation which consists of densely spaced, indistinguishable reflections.
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Eased (edge)
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Eased (edge) - An acoustical panel edge detail also known as a quarter-inch (¼") bevel.
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Early reflection
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Early reflection - Reflected energy that occurs in close proximity to the source but is slightly out of synchronization (time / phase) with the source information.
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E400 Test
Drywall
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Drywall - A dense architectural wall construction material applied to wood or metal studs, A/K/A Sheet Rock or Gypsum Wall Board (GWB), useful primarily as a sound barrier but is low frequency absorber in some applications.
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Doppler effect
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Doppler effect - The apparent shift in frequency when the sound source, or the observer, is in motion.
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Diffusor
Direct sound
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Direct sound
- Sound Wavesarriving at the listening location directly from the source. Differing from reflected sound, which arrives at the listening location after bouncing off the surrounding surfaces.
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