Description
Array Microphone Type 4959 is a ¼” prepolarized microphone specially designed for use in HBK’s hand-held and foldable arrays.
- Sensitivity: 11.2mV/Pa (–39 dB re 1 V/Pa)
- Frequency Range: 50 Hz – 20 kHz
- Dynamic Range: 32 – 134 dB
- Built-in DeltaTron® preamplifier with TEDS (IEEE 1451.4 V.1.0)
- Specified phase-matching
- Transfer function described in TEDS
- Dimensions: 13 mm long, 7 mm diameter
- Temperature Range: –10 to +55°C (+14 to +131°F)
Use Scenarios
- In Brüel & Kjær hand-held and foldable arrays
Type 4959 microphones have good, stable amplitude and phasematching over wide ranges of temperature and humidity. Their frequency response is optimised for a flat response in a pressure field.
Each microphone’s built-in TEDS (Transducer Electronic Data Sheet) contains information about the complex transfer function, enabling applications to use data for individual transducers, resulting in more precise measurements.
The preamplifier is an industry standard DeltaTron (constant current line drive) type, allowing the use of the same 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.
