Sound - Hearing Threshold vs. Age
Shift in hearing threshold for men and women vs. age.
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:
Room acoustics and acoustic properties, decibel A, B and C, Noise Rating (NR) curves, sound transmission, sound pressure, sound intensity and sound attenuation.
Human physiology, air quality and comfort temperatures, activity and metabolic rates, health effects of carbon monoxide and more.
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.
NR - the Noise Rating Curve
The Noise Rating (NR) Curve used to determine acceptable indoor environments for hearing preservation, speech communication and annoyance.
Sound - Frequency, Wavelength and Octave
An introduction to the nature of sound with frequencies, wave-lengths and octaves.
Sound Intensity, Power and Pressure Levels
Introduction to decibel, sound power, intensity and pressure.