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Octave band centre frequency

Measurement of frequency is usually based on an octave band and recorded as octave band centre frequency . In an octave band the upper frequency is twice the lower frequency. The octave band centre frequency is 1.414 X lower frequency and typical values are (in Hz) ... [Pg.167]

Octave band centre frequency if) Hz Octave band range Hz... [Pg.422]

The previous two sections have not attempted to define frequency in terms of a bandwidth. The generally accepted bandwidths used within the field of noise control are octave bands, that is a range or band of frequencies with the upper frequency limit equal to twice the lower limit f/. Each octave band is defined by the centre frequency fob where... [Pg.422]

Two basic instruments are used to assess the workplace for noise the soimd pressure level (SPL) meter, and the noise dose meter (NDM). The SPL meter in normal mode automatically adds the dB levels at various frequencies to give a total dB level. This is when it is in dBlin (dB hnear) setting. Many SPL meters have either a built-in or add-on octave band analyser . This allows you to measure the SPL at a range of frequencies, each at the centre of an octave band. Just as in music, going up one octave from a particular frequency means doubling the frequency. [Pg.405]

See other pages where Octave band centre frequency is mentioned: [Pg.432]    [Pg.558]    [Pg.558]    [Pg.142]    [Pg.432]    [Pg.558]    [Pg.558]    [Pg.142]    [Pg.422]    [Pg.409]    [Pg.546]   
See also in sourсe #XX -- [ Pg.167 ]

See also in sourсe #XX -- [ Pg.164 ]



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