Uses
- Measurements using:– Spatial Transformation of Sound Fields (STSF) Type 7688– Non-stationary STSF Type 7712– Beamforming Type 7768
- Hand-held array measurements
- Simultaneous recording of time signals in medium to large microphone arrays, for example, simulated pass-by measurements
- Cost-effective, in-car measurements
| Features
- Sensitivity: 12.5 mV/Pa (–38 dB re 1 V/Pa)
- Frequency range: 10 – 20 000 Hz
- Dynamic Range: 28 – 140 dB
- Built-in DeltaTron® preamplifier with TEDS – IEEE 1451.4 V.1.0
- Excellent amplitude and phase-matching
- Clips directly into existing Brüel & Kjær array systems
- Detachable cable with SMB coaxial plug
- Dimensions: 34 mm long, 7 mm diameter
- Temperature: – 10 to + 55˚C (+ 14 to + 131˚F)
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The TEDS (Transducer Electronic Data Sheet) contains information about the complex transfer function, hence enabling applications to calculate corrections for the individual transducer, resulting in more precise measurements. The microphone preamplifier is of the industry standard DeltaTron (constant current line drive) type allowing the use of only one cheap coaxial cable for signal, power supply, and TEDS.
A rugged protection grid provides an integrated heat shield. The microphone is front-vented for pressure equalization.
Type 4958 is a precision array microphone offering extended TEDS and excellent phase matching and amplitude linearity over a wider frequency range compared to Type 4957.
For a full Description and Specifications, see
Product Data
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