anechoic chamber

Thân thiện

A scientist stands inside an anechoic chamber to test a microphone.

Definition

1. Noun:
   • A room designed to absorb sound and electromagnetic waves: An anechoic chamber is a specialized room whose surfaces are covered with sound-absorbing or radio-wave-absorbing materials. This design minimizes reflections (echoes and reverberation) to create an environment with extremely low background noise and interference, simulating free-field conditions.

Usage and Examples

• Noun:
  • The engineers tested the microphone's sensitivity in the anechoic chamber.
  • To measure the antenna's radiation pattern accurately, it must be placed in an anechoic chamber.

Advanced Usage

• Scientific and Engineering Context: The term is primarily used in acoustics, telecommunications, and aerospace engineering. It describes a controlled environment for precise measurements.
  • The anechoic chamber's quietness is so profound that one can hear their own blood circulating.

Variants and Related Words

• Anechoic (Adjective): Having or producing no echo. Describes the quality of the chamber or similar environments.
  • The anechoic lining on the walls absorbs sound completely.

Synonyms

• Echo-free room: A descriptive synonym emphasizing the lack of sound reflections.
• Reverberation chamber (Antonym): A chamber designed to create diffuse, reverberant sound fields, used for contrasting acoustic measurements.

Related Phrases and Concepts

• Free-field simulation: A key purpose of an anechoic chamber is to simulate an open, unbounded space where sound or radio waves propagate without reflections.
• Radio frequency (RF) anechoic chamber: A specific type lined with material to absorb electromagnetic waves for testing antennas and radar.

Học thuật

Noun

1. a chamber having very little reverberation