Sound - Room Attenuation in Direct Sound Fields

Calculate room attenuation in direct sound fields as a function of room size and room sound absorption characteristics. The diagram is based on a listener within 5 ft (1.5 m) from the source.

Room Attenuation Calculator

Room attenuation in a direct sound field depends on room size and absorption characteristics.

Room Absorption Types

  • Hard: Bath rooms, large churches, gymnasiums, factories
  • Average: Private homes, concert halls, restaurants, offices, conference rooms, hotel rooms, school rooms, hospitals, libraries, churches, reception rooms
  • Soft: Radio and TV studios, theaters

Note: Listener is positioned within 5 ft (1.5 m) from the sound source. 1 ft² = 0.0929 m²

Calculator

Inputs

Results

Room Attenuation-- dB

Example

For an "average" room with a surface area of 100 m² (1076 ft²), the room attenuation is approximately 5 dB.