SI522 Sound Intensity Probe
The measurement of sound intensity provides information of magnitude and direction in the sound field, which is used for a variety of applications such as the determination of sound power, sound absorption, sound transmission, sound source localization, etc.
SI522 is the new sound intensity measurement equipment developed by BSWA according to IEC 61043 and GB/T 17561. It has a pair of BSWA phase-matched 1/2-inch prepolarized microphone MP231 which are in the face to face configuration. The microphones are separated by a fixed distance in the sound filed, and three solid spacers are supplied with probe to define the distance between the microphones at 8.5 mm, 12 mm and 50 mm which cover the full frequency range from 50 Hz to 6.3 kHz. The spacers are threaded studs on the microphone grids and can be easily interchanged.
SI522 supplied with BSWA MA401 preamplifier and attached with a pair 1/4-inch to 1/2-inch adapters (straight and right-angle) for connect to MP231 microphone. The aluminum handle of sound intensity probe has remote control function, which can be easily handle by one person to carry out measurement with certain software.
Product Features
● Microphone pairs matched for phase and amplitude response
● Handle with remote control function
● Frequency range 50 Hz ~ 6.3 kHz (1/3 octave)
Applications
● Sound-intensity measurement
● Sound-source localization
● Equipment troubleshooting
| Specification | |
|---|---|
| Standard | IEC 61043:1993 Class 2, GB/T 17561-1998 Class 2 |
| 8.5 mm Spacer: 250 Hz ~ 6.3 kHz | |
| Frequency Range (1/3 Octave) | 12 mm Spacer: 250 Hz ~ 5 kHz |
| 50 mm Spacer: 50 Hz ~ 1.25 kHz | |
| Probe Output Connector | Lemo connector (EPG.1B.307) |
| Probe Output Cable | Adapter cable (Lemo to dual BNC and USB type B), 3m extension cable |
| Operating Environment | Temperature: -10 °C ~ 50 °C, Humidity: 0 ~ 90 %RH |
| Dimension (mm) | W30 x H433 x D70 |
| Shipping Case Dimension (mm) | W428 x H153 x D350 |
| Weight | 0.46kg (Intensity probe only with 8.5mm spacer) |
| Microphone Pairs | |
| Microphone Pairs | Phase-matched MP231 prepolarized microphone |
| Diameter | 1/2-inch |
| Sensitivity (with adapter) | 40mV/Pa |
| Phase Difference | ≤0.15°@ 50 Hz ~ 630 Hz；≤[f(Hz)/4000]°@ 630 Hz ~ 6.3 kHz |
| Amplitude Response | ≤0.2 dB @ 50 Hz ~ 1 kHz；≤0.5 dB @ 1k Hz ~ 6.3 kHz |
| Sensitivity Difference | ≤1 dB |
| Equivalent Air Volume | 46 mm3 @ 250 Hz |
| Temperature Coefficient(-10 °C ~ 50 °C) | -0.012 dB/°C |
| Humidity Influence | ≤0.1 dB |
| Pressure Coefficient (250 Hz) | -0.004 dB/kPa |
| Dimension | IEC 61094-4 WS2 |
| Microphone Pairs | Phase-matched MP231 prepolarized microphone |
| Preamplifier | |
| Preamplifier | MA401 (ICCP power supply) |
| Input Impedance | 6 GΩ||0.4 pF |
| Phase Difference | ≤0.03°@ 50 Hz ~ 250 Hz；≤f[kHz]x0.1°@ 250Hz~10kHz |
Download information:
BSWA-III-C021-05-P0310_Brief
