ISO 140-9:1985
w
ISO 140-9:1985
3965

Abstract 

Specifies a method for measuring a quantity called the suspended ceiling normalized level difference when the sound transmitted by paths other than the required paths is negligible.


General information 

  •  :  Withdrawn
     : 1985-02
  •  : 1
     : 6
  •  : ISO/TC 43/SC 2 Building acoustics
  •  :
    91.060.30 Ceilings. Floors. Stairs
    91.120.20 Acoustics in building. Sound insulation

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