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Norm
ÖNORM EN ISO 266
Issue date: 1997 11 01
Acoustics - Preferred frequencies (ISO 266:1997)
This International Standard specifies preferred frequencies for acoustical measurements. The preferred frequencies
are based on the RIO series of preferred numbers in IS...
Valid
§ Legal References
Publisher:
Austrian Standards International
Format:
Digital | 5 Pages
Language:
German
| English
| Download GER/ENG
Optionally co-design standards:
ICS
This International Standard specifies preferred frequencies for acoustical measurements. The preferred frequencies
are based on the RIO series of preferred numbers in IS0 3 and the reference frequency of 1 000 Hz.
For most acoustical measurements and presentations of data, a frequency spacing based on a constant percentage
increment is generally preferred and the test frequencies then form a geometric series. For certain acoustical
measurements, a constant frequency increment is a suitable spacing.
The International Standard deals with the geometric series and is not intended to apply to cases where a constant
frequency increment, or other particular spacing, would be more suitable, or where there may be good reasons for
the adoption or retention of other frequencies.
This International Standard does not deal with:
- frequencies for music;
- all audiometric frequencies;
- series other than RIO from IS0 3.