IEC Acoustic Standard IEC 61400-11
IEC Acoustic Standard IEC 61400-11
IEC Acoustic Standard IEC 61400-11
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7 Measurements and Measurement Positions<br />
<strong>Acoustic</strong> measurements<br />
The following information will be determined at integer wind<br />
speeds of 6, 7, 8, 9, and 10m/s<br />
- the apparent sound power levels<br />
- the one-third octave band levels<br />
- the tonality (not required for AWEA)<br />
Optional measurements<br />
- directivity<br />
- infrasound<br />
- low-frequency noise<br />
- impulsivity<br />
NATIONAL RENEWABLE ENERGY LABORATORY<br />
14
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