Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications!

This is an AMP page - Open full page! for all features.

Sound - Room Attenuation in Direct Sound Fields

Sponsored Links

Room attenuation in a direct sound field as function of room size and room sound absorption characteristics:

  • 1 ft2 = 0.0929 m2

The diagram is based on a listener within 5 ft (1.5 m) from the source.

Typical Rooms and their Absorption Characteristics

  • 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

Example - Sound Attenuation in an "Average" Room

The sound attenuation in an "average" room with surface 100 m2 (1076 ft2) can be estimated from the diagram above to be approximately

5 dB

Sponsored Links

Related Topics

Acoustics

Room acoustics and acoustic properties. decibel A, B and C calculations. Noise Rating (NR) curves. Sound transmission through walls. Calculate sound pressure, sound intensity and sound attenuation.

Related Documents

Propagation of Sound Indoors - the Room Constant

In a room the sound or noise will reach the receiver as direct and reverberant sound.

Sound - Attenuation and Speed vs. Sound Frequency and Air Humidity

The speed and attenuation of sound in moist air varies with sound frequency and air humidity.

Sound - Attenuation and the Directivity Coefficient

The attenuation in a room depends on the location of the sound source and the receiver - and the room constant.

Sound - Reverberation Time

The sound reverberation time indicates how long it takes until the sound pressure level in a room is decreased with 60 dB.

Sound - Room Absorption Characteristics

Mean absorption coefficients and reverberation times in typical rooms.

Sound - Room Absorption Coefficients

Room sound absorption and absorption coefficients for common materials like plaster walls, brickwork, plywood panels and more.

Sound Pressure

Sound Pressure is the force of sound on a surface perpendicular to the propagation of sound.

Sponsored Links

Search Engineering ToolBox

  • the most efficient way to navigate the Engineering ToolBox!

SketchUp Extension - Online 3D modeling!

Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro . Add the Engineering ToolBox extension to your SketchUp from the Sketchup Extension Warehouse!

Privacy

We don't collect information from our users. Only emails and answers are saved in our archive. Cookies are only used in the browser to improve user experience.

Some of our calculators and applications let you save application data to your local computer. These applications will - due to browser restrictions - send data between your browser and our server. We don't save this data.

Google use cookies for serving our ads and handling visitor statistics. Please read Google Privacy & Terms for more information about how you can control adserving and the information collected.

AddThis use cookies for handling links to social media. Please read AddThis Privacy for more information.