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Science > Acoustics

autocorrelation

Science; Acoustics

Autocorrelation is a mathematical tool for finding repeating patterns, such as the presence of a periodic signal which has been buried under noise. It is frequently used for ...

coherence

Science; Acoustics

Coherence is a number between one and zero, and is a measure of the degree of linearity between two related signals, such as the excitation force (input) of a structure related to ...

modal analysis

Science; Acoustics

Modal analysis is a process of determining the natural frequencies, damping factors, and mode shapes for a structure. This is usually done either experimentally through frequency ...

balanced noise criteria

Science; Acoustics

Balanced noise criteria is a refinement of NC noise criteria. The rating is determined by the SIL speech interference level and gets the classification (R) for rumble if the ...

pitch

Science; Acoustics

Pitch is a subjective auditory sensation and depends on the frequency, the harmonic content, and to a lesser extent on the loudness of a sound.

charge injection calibration (CIC)

Science; Acoustics

Charge injection calibration is a technique patented by Bruel & Kjaer for on-line verification of the integrity of the entire measurement chain, for example, microphone, ...

time domain

Science; Acoustics

Time domain is a term used to describe the analysis of mathematical functions, or physical signals, with respect to time. An oscilloscope is a tool commonly used to visualize ...

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