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Improvements to a small free-field listening room

Publication ,  Journal Article
Hebrank, JH; MacDuff, JN; Wright, D
Published in: J. Sound Vib. (UK)
1974

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 Scholars

Published In

J. Sound Vib. (UK)

Publication Date

1974

Volume

35

Issue

1

Start / End Page

139 / 142

Related Subject Headings

  • Acoustics
  • 51 Physical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences
 

Citation

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Hebrank, J. H., MacDuff, J. N., & Wright, D. (1974). Improvements to a small free-field listening room. J. Sound Vib. (UK), 35(1), 139–142.
Hebrank, J. H., J. N. MacDuff, and D. Wright. “Improvements to a small free-field listening room.” J. Sound Vib. (UK) 35, no. 1 (1974): 139–42.
Hebrank JH, MacDuff JN, Wright D. Improvements to a small free-field listening room. J Sound Vib (UK). 1974;35(1):139–42.
Hebrank, J. H., et al. “Improvements to a small free-field listening room.” J. Sound Vib. (UK), vol. 35, no. 1, 1974, pp. 139–42.
Hebrank JH, MacDuff JN, Wright D. Improvements to a small free-field listening room. J Sound Vib (UK). 1974;35(1):139–142.

Published In

J. Sound Vib. (UK)

Publication Date

1974

Volume

35

Issue

1

Start / End Page

139 / 142

Related Subject Headings

  • Acoustics
  • 51 Physical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences