Acoustics

Acoustics

Of or pertaining to the study of mechanical waves in all stages of matter including sounds, vibration, ultrasounds, and infrasound.

Industry: Physics; Science

Add a new term

Contributors in Acoustics

Become a Contributors

Acoustics

A signal that repeats the same pattern over time is called periodic, and the period is defined as the length of time encompassed by one cycle, or repetition. The period of a periodic waveform is the ...

non-stationary signal

Science; Acoustics

A signal whose frequency content changes within a captured time frame.

noise isolation class (NIC)

Science; Acoustics

A single number rating of the degree of speech privacy achieved through the use of an acoustical ceiling and sound absorbing screens in an open office. NIC has been replaced by the articulation class ...

single number rating (SNR)

Science; Acoustics

A single number rating system for hearing protectors, set up by the EU, BS EN ISO 4869

noise reduction rating (NRR)

Science; Acoustics

A single-number rating system used to compare and label hearing protectors. For example the protected dBA = unprotected dBC - NRR.

noise reduction coefficient (NRC)

Science; Acoustics

A single-number rating system used to compare the sound-absorbing characteristics of building materials. A measurement of the acoustical absorption performance of a material, calculated by averaging ...

hanning window

Science; Acoustics

A smooth amplitude weighting of a time signal with zero at the beginning and the end of the time record - 'bell shaped'. Commonly used in FFT analysis when analyzing gated continuous signals and long ...