To the average listener, it is known that the farther one gets from a sound source, the quieter the sound becomes. Upon closer investigation, one realizes that different rates of sound loss occur at varying frequencies. The rate of sound loss for individual frequencies is important in the design of many different acoustic-related objects, from loudspeaker enclosures, to auditoriums. The main components of speaker enclosures and auditoriums are not only their size and shape, but the use of different types of insulation inside of them. This experiment will attempt to determine the effects of insulation and distance on sound pressure.

 

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