GRAS 50GI-R CCP Intensity Probe with Remote Control
Freq range: IEC 61043 Class 1
Dyn range: 27 dB(A) to 146 dB
Sensitivity: 12.5 mV/pa
The 50GI-R is a sound intensity probe for direct connection to signal analyzers or data acquisition devices with IEPE inputs. The probe includes a pair of phase-matched prepolarized precision microphones which meet the requirements in IEC standard 61043 for a class-1 intensity probe. The small rugged ¼" CCP preamplifiers ensure minimum disturbances to the sound field for accurate measurements in the full frequency range.
Technology
Typical Applications and Uses
- Sound intensity measurements
- Sound source location
- Sound power measurements
- IEC 61043 standard measurements
- Sound source ranking
- Sound intensity mapping
Design
The probe set includes solid interchangeable spacers for microphone separations from 12 mm to 100 mm so that the probe can cover the frequency range from 50 Hz to 10 kHz.
All components are made specifically for sound intensity applications. Each small ¼" diameter by 40 mm long microphone preamplifier is housed in a robust stainless steel casing, which enables novel probe designs for reducing disturbances to the soundfield otherwise brought about by the effects of shadows and diffraction, and a symmetry which enables reliable calibrations as described in the proposed standard (ISO/DIS 9614-2) for sound power measurements using sound intensity measurements.
The 50GI-R CCP Intensity Probe comprises a 40GK sound Intensity Microphone Pair, two 26CB CCP Microphone Preamplifiers, four solid spacers of various lengths, windscreen, and probe handle with remote control.
The 50GI-R is delivered in a carrying case as a ready-to-use kit, complete with all the above accessories. The microphones are ½" free-field prepolarized microphones with a uniquely-designed pressure equalization system which ensures extremely well defined phase characteristics.
The microphones and preamplifiers are mounted on a swivel head on the telescopic arm of the Remote control handle. To cover the full frequency range from 50 Hz to 10 kHz, the 50GI-R probe is delivered with four solid spacers for spacing the microphones at 12 mm, 25 mm, 50 mm and 100 mm. These spacers can be easily interchanged without dismantling the probe.
Dimensions in mm
Specifications
GRAS Sound & Vibration reserves the right to change specifications and accessories without notice.
Ordering info
Included
| GRAS 40GK | Microphone set |
| GRAS 26CB Set | ¼" CCP Preamplifier |
| Spacers | |
| GRAS RA0003 | Adapter for 1/2" microphone and 1/4" preamplifier |
| GRAS RA0001 | Right-angled (90º) Adapter for 1/2" microphone and 1/4" preamplifier |
| GRAS AA0021 | 5 m cable for Intensity Probe |
| GRAS AC0024 | Adapter Cable for CCP Intensity Probe |
| GRAS AA0084 | Cable, SMB-Microdot, 30 cm (male-male) |
| GRAS KE0132 | Serial to USB Adapter |
| GRAS AI0048S | Probe handle |
| GRAS AI0001 | Windscreen |
Optional
| GRAS 51AB | Phase Calibrator according to IEC 61043 |
| GRAS 42AP | Intelligent Pistonphone, Class 0 |
| GRAS RA0024 | Coupler for two-port Calibration |
GRAS Sound & Vibration reserves the right to change specifications and accessories without notice.
