Microphone & PreAmplifier Combinations
Type 4959 Short 20 KHZ Microphone For Handheld Arrays
Array Microphone Type 4959 is a ¼” prepolarized microphone specially designed for use in Brüel & Kjær’s hand-held and foldable arrays.
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.
Capacitance: pF
Diameter: ¼
Dynamic range: 32 – 134 dB
Frequency range: 50 – 20000 Hz
Inherent noise: 32 dB A
Lower limiting frequency -3dB: Hz
Optimised: Array
Polarization: Prepolarized
Polarization voltages: V
Pressure coefficient: dB/kPa
Sensitivity: 11.2 mV/Pa
TEDS UTID: I27-0-0-1U
Temperature coefficient: db/ºC
Temperature range: -10 – 55 C
Venting: Front
Weight: 3 gram
Sound field: Special
Input type: CCLD IEPE
Microphone type: Array