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.
Diese ÖNORM gibt Normfrequenzen für akustische Messungen an. Die Normfrequenzen basieren auf der Normzahlreihe R10 nach ISO 3. Diese Norm behandelt geometrische Reihen und ist nicht für die Benutzung in den Fällen vorgesehen, wo ein Zuwachs um einen festen Frequenzbetrag oder andere besondere Frequenzabstände gefordert werden.