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Sound - Hearing Threshold vs. Age

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The hearing threshold is the minimum sound level a person’s ear is able to detect any sound. For adults - 0 dB is the reference level.

The hearing threshold is normally reduced with age as indicated below:

Men

Women

 

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Related Topics

Acoustics

Room acoustics and acoustic properties. decibel A, B and C calculations. Noise Rating (NR) curves. Sound transmission through walls. Calculate sound pressure, sound intensity and sound attenuation.

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Human physiology vs. air quality, comfort temperatures, activity and metabolic rates. Health effects of gases adn polutions like carbon monoxide and more.

Related Documents

Decibel A, B and C

Sound pressure filters that compensates for the hearing sensed by the human ear.

Maximum Sound Pressure Levels in Rooms

Maximum recommended sound pressure levels in rooms like kindergartens, auditoriums, libraries, cinemas and more.

Noise - EPA Protective Levels

The noise level should not exceed certain values to protect public health and welfare.

Noise - Maximum Daily Dose Level

Maximum daily noise dose level when exposed to periods with different levels.

Noise Criterion vs. Noise Rating and dB(A)

Comparing Noise Criterion (NC, NCB, RNC) to Noise Rating (NR) and dB(A).

Noise Exposure - Permissible Levels and Duration

Exposure to noise should be controlled so that it is less than a maximum combination of exposure level and duration.

NR - the Noise Rating Curve

The Noise Rating (NR) Curve used to determine acceptable indoor environments for hearing preservation, speech communication and annoyance.

Required Voice Level at Distance

Distance and perception of voice.

Sound - Frequency, Wavelength and Octave

An introduction to the nature of sound with frequencies, wave-lengths and octaves.

Sound Intensity

Acoustic power of sound per unit area.

Sound Intensity, Power and Pressure Levels

Introduction to decibel, sound power, intensity and pressure.

Sound Pressure

Sound Pressure is the force of sound on a surface perpendicular to the propagation of sound.

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