Improvements to a small free-field listening room

Journal Article (Academic article)

An inexpensive free-field listening room (7 ft 8 in×5 ft 9 in×6 ft 7 in high) was designed and constructed with walls made of 5 inch high acoustical foam wedges backed by 11/2 inch foam and a 31/2 inch layer of building-grade Fiberglas. The composite wall construction creates a rugged, non-irritating surface that is highly absorbent and relatively inexpensive. Deviations from the inverse square law are less than 2.3 dB above 500 Hz. Reverberation from a 40 ms 1000 Hz pulse is 31 dB below the original pulse. Results of these two tests are compared with measurements by Marsh (1968) in a room of similar volume having flat 4 inch foam walls

Duke Authors

Cited Authors

  • Hebrank, JH; MacDuff, JN; Wright, D

Published Date

  • 1974

Published In

  • J. Sound Vib. (Uk)

Volume / Issue

  • 35 / 1

Start / End Page

  • 139 - 142