ISO 226:2003
Acoustics - Normal equal-loudness-level contours
- Standard No.
- ISO 226:2003
- Release Date
- 2003
- Published By
- International Organization for Standardization (ISO)
- Status
- 2023-03
- Replace By
- ISO 226:2023
- Latest
- ISO 226:2023
- Scope
- This standard specifies the relationship between the frequency and sound pressure level of a continuous pure tone that is perceived as equally loud by the listener. The conditions based on the regulations are as follows: a) The sound field when the listener is not present consists of free plane traveling waves; b) The sound source is in front of the listener; c) The sound signal is pure tone; d) The sound pressure level is at the center of the listener's head Position measurement, but the listener is not present; e) Binaural audiometry; f) The listener is a normal ear person aged 18 to 25 years old. The data are presented in the form of figures in Appendix A and tables in Appendix B. According to GB/T 3240-1982, the commonly used frequencies are the 1/3 octave center frequency from 9 20 H2 to 12 500 Hz.
ISO 226:2003 Referenced Document
- GB/T 3240-1982 Preferred frequencies for the acoustical measurement
ISO 226:2003 history
- 2023 ISO 226:2023 Acoustics — Normal equal-loudness-level contours
- 2003 ISO 226:2003 Acoustics - Normal equal-loudness-level contours
- 1987 ISO 226:1987 Acoustics; Normal equal-loudness level contours
