INTERNATIONAL STANDARD ISO 226:2023(E) Acoustics — Normal equal-loudness-level contours 1 Scope This document 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:

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.

Oct 25, 2023 · As significant errors were reported in 1985 for the international standard related to equal-loudness-level contours (ELLCs) for pure tones, the earlier international standard was fully revised in...

Equal-loudness contours for listening in free sound fields are given in ISO 226-BS 3383. The specification for the minimum audible field in ISO 226 is the basis for sound field audiometry as described in ISO 8253-2.

The ISO 226 standard is the Acoustics Standard for normal equal-loudness-level contours. Normal equal-level-contours are often referred to as equal-loudness-curves and provide technical data to establish the perceived loudness levels of humans with 'normal' hearing aged between 18 and 25 years of age.

The standard ISO 226 [1] specifies combinations of sound pressure levels and frequencies of pure continuous tones that are perceived as equally loud by human listeners. These equal-loudness-level contours are part of the foun-dation of the psychoacoustic research and are constantly evolving.

Aug 15, 2003 · 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: a) the sound field in the absence of the listener consists of a free progressive plane wave;

This document 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: a) the sound field in the absence of the listener consists of a free progressive plane wave;

Equal-loudness contours for listening in free sound fields are given in ISO 226-BS 3383. The specification for the minimum audible field in ISO 226 is the basis for sound field audiometry as described in ISO 8253-2.