Customer Service:
Mon - Fri: 8:30 am - 6 pm EST

 Most recent

ISO 226:2003

Acoustics -- Normal equal-loudness-level contours

This International Standard specifies combinations of sound pressure levels and frequencies of pure continuous tones which are perceived as equally loud by human listeners. The specifications are based on the following conditions: the sound field in the absence of the listener consists of a free progressive plane wave; the source of sound is directly in front of the listener; the sound signals are pure tones; the sound pressure level is measured at the position where the centre of the listener's head would be, but in the absence of the listener; listening is binaural; the listeners are otologically normal persons in the age range from 18 years to 25 years inclusive.

Content Provider
International Organization for Standardization [ISO]

Others Also Bought

ISO 532:1975
Acoustics - Method for calculating loudness level
ANSI S3.20-1995 (R2003)
Bioacoustical Terminology

As the voice of the U.S. standards and conformity assessment system, the American National Standards Institute (ANSI) empowers its members and constituents to strengthen the U.S. marketplace position in the global economy while helping to assure the safety and health of consumers and the protection of the environment.