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The Ear

The Ear. MUM 2600 Professor Calle Miami-Dade College SEDT. Basic terms. SPL - Sound pressure level dB - Decibel. An exponential unit of measurement equaling 1/10th of a bell named after Alexander Graham Bell.

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The Ear

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  1. The Ear MUM 2600 Professor Calle Miami-Dade College SEDT

  2. Basic terms • SPL - Sound pressure level • dB - Decibel. An exponential unit of measurement equaling 1/10th of a bell named after Alexander Graham Bell. • Sound waves - Sound radiates outwardly in a spherical pattern and is absorbed by the ear and recording devices as a wave. • Amplitude - volume. • Frequency - pitch.

  3. Basic terms - continued • Velocity - sound travels through the air at 68˚F at approximately 1130 feet per second. The speed increases as the temperature rises. • Cycle - one complete excursion of a wave. • Period - The time required to complete one cycle.

  4. Basic terms - continued • Hertz - A unit of measurement of the number of frequency cycles occurring in one second. • Compression - An area containing higher than normal sound pressure. • Rarefaction - An area containing lower than normal sound pressure.

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