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•enligt accepterade internationella standarder kan frekvensområdet för hörbara ljud delas in i tio oktavband.•oktavband och tersband betecknas oftast efter sina mittfrekvenser (se en iso 266:2003 – acoustics – preferred frequencies).
•according to accepted international standards, the frequency range of audible sounds can be divided into 10 octave bands.•octave and 1/3-octave bands are most often denoted by their centre frequencies (see en iso 266:2003 – acoustics – preferred frequencies).