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Sound Transmission Through Massive Walls or Floors

Sound and noise transmission through massive walls or floors - concrete or similar

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Sound transmission through a massive wall or floor depends primarily on the mass of the construction. The mean attenuation through a massive construction is indicated in the chart below:

massive walls floors sound attenuation

The attenuation for a specific frequency can be modified by subtracting the value in the table below from the mean value indicated in the chart above.

Frequency
(Hz)
63 125 250 500 1000 2000 4000 8000
Attenuation Correction
(dB)
-13 -9 -5 -1 3 7 11 15

Example - Concrete Floor and Sound Attenuation

sound transmission massive floor

The mass of a concrete floor with density 2300 kg/m3 and thickness 0.2 m can be calculated as

(2300 kg/m3) (0.2 m)

    = 460 kg/m2

Using the chart above the mean sound attenuation for the floor can be estimated to

52 db

The attenuation at 1000 Hz

(52 db) - (3 dB)

    = 49 dB

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Related Topics

  • Acoustics - Room acoustics, acoustic properties - decibel A, B and C - Noise Rating (NR) curves, sound transmission, sound pressure, sound intensity, attenuation and more ..
  • Noise and Attenuation - Noise is usually defined as unwanted sound - noise, noise generation, silencers and attenuation in HVAC systems

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