ISO 5136:1990 PDF
Acoustics — Determination of sound power radiated into a duct by fans — In-duct method
Название (английский):
ISO 5136:1990
Acoustics — Determination of sound power radiated into a duct by fans — In-duct method
- Статус документа:
- Отменён
- Формат:
- Электронный (PDF)
- Количество страниц:
- 22
- Дата публикации:
- 6 декабря 1990 г.
- Издание:
- ISO IS 5136 edition 1 version 1
- ICS:
- 91.120.20
Описание (английский):
Gives a method for testing ducted fans. Applies to fans which emit steady, broadband, narrow-band and discrete-frequency sound. Applies to air temperatures between -50 °C and +70 °C. The test duct diameter range is from 0,15 m to 2 m. The maximum flow velocity is 30 m/s and the maximum swirl angle is 15°. An example of a method for determining the angle of swirl is given in annex F. The one-third octave band centre frequency range is from 50 Hz to 10 000 Hz.
Технические детали
- Технический комитет
- ISO/TC 43/SC 1 - Noise
- SKU
- ISO 5136:1990