Room acoustics and acoustic properties, decibel A, B and C, Noise Rating (NR) curves, sound transmission, sound pressure, sound intensity and sound attenuation.
Sound pressure filters that compensates for the hearing sensed by the human ear.
Physiological effects from low-frequency noise or vibrations.
Noise Criterion - NC - level is a standard uesd to describe the relative loudness of a space within a range of frequencies.
Calculate Noise Criterion (NC) from octave band pressure levels.
An online Noise Rating (NR) calculator.
The Noise Rating (NR) Curve used to determine acceptable indoor environments for hearing preservation, speech communication and annoyance.
Background noise frequencies that interferes with speech.
Shift in hearing threshold for men and women vs. age.
Satisfactory, difficult and impossible noise levels for telephone use in noisy areas.
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