Sound transmission through slotted concrete blocks with attached gypsum board

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DOIResolve DOI: http://doi.org/org/10.1121/1.407354
AuthorSearch for:
TypeArticle
Journal titleJournal of the Acoustical Society of America
ISSN0001-4966
Volume94
Issue5
Pages27132720; # of pages: 8
SubjectAcoustics and Noise Control; Cement and Concrete; Walls
AbstractMeasurements of sound transmission loss through slotted concrete blocks with attached gypsum board showed that the cavity resonance of the blocks has an important beneficial effect. It counteracts the mass-air-mass resonance that occurs when gypsum board is added to the surface of a concrete block wall leaving an air space behind it. This significantly increases the sound transmission class rating relative to the same systems with normal-weight nonslotted blocks. The effects of the two resonances could be seen at different frequencies when there was no sound-absorbing material in the air space behind the gypsum board. When the air space was filled with sound-absorbing material, however, both resonances moved together and could not be separated, but the transmission losses and sound transmission class for the composite wall were still significantly greater than those for wall systems using nonresonant blocks. Sound absorption measurements for the slotted blocks showed the need for one-third octave band data in place of the octave band data often found in trade literature.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
IdentifierIRC-P-3382
NRC number36135
4760
NPARC number20359161
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Record identifier528698c9-c69e-4171-a934-faf996104c95
Record created2012-07-20
Record modified2016-05-09
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