Spherical Surface Fixture
In the measurement of sound power level according to ISO 3745-2003, 20 measurement positions are required on a spherical measurement surface enveloping a noise source in anechoic and hemi-anechoic room. However, it is difficult to mount 20 microphones on tripods in a spherical surface.
BSWA developed MF720 (and MF710) microphone fixture specifically for such measurements. MF720 is designed according to ISO 3745-2003 to mount 20 microphones over the spherical surface; MF710 is a 10 positions version according to ISO3745; ISO7779 and GB6882.
MF720/ MF710 features:
- 20 / 10 microphone positions
- The position and orientation of each microphone can be adjusted to fit the amendment of the ISO standards
- Portable with light weight and the parts can be disassembled for easy transportation
|MICROPHONE SPHERICAL SURFACE FIXTURE MF710/MF720|
|No. of Microphone Positions||20||10|
|Standards||ISO3745-2003||ISO7779, GB6882-88; ISO3475-1982|
|Radius (microphone positions) （m）||1.0||1.0|
|Microphone Size to be Fixed on (inch)||1/2||1/2|
|Carrying Case (mm)||1500 * 350 * 200||1500 * 350 * 200|
|MPA231 (1/2” ICCP Microphones)||20||10|
|CBB 020 (20m BNC cables)||20||10|