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

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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 analyzing time domain ...

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 the vibration ...

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 response testing or ...

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 spectrum is rich in low ...

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, preamplifier and cabling. ...

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 real-world signals in ...