TYPE 4942-A-021

½-inch diffuse-field microphone with Type 2671 preamplifier, 20 Hz to 16 kHz, prepolarized

Designed for general random-incidence measurements and for noise measurements in accordance with ANSI standards.

Request a quote

Type 4942-A-021 is designed for general random-incidence measurements and for standardised noise measurements in accordance with ANSI standards.

USE SCENARIOS

  • Diffuse-field measurements
  • In-car measurements
  • Connects to CCLD input

THIS MICROPHONE IS A FACTORY-ASSEMBLED COMBINATION OF:

The unit is assembled in a clean-room environment and sealed together, after which it is assigned one single type number and one single serial number. This means that the combined unit has better precision and long-time stability, and is handled as one complete unit.

The unit also contains TEDS, which means that information about the serial number, type and sensitivity is stored within it.

THE BENEFITS OF USING A MICROPHONE-PREAMPLIFIER COMBINATION ARE:

  • Better stability and precision. Because the unit is assembled in clean-room facilities, there is no contamination.
  • Ease of use. Your analyzer front-end and software will automatically detect the type number, serial number and sensitivity because of the built-in TEDS technology. There is no need to enter this manually for every channel. 
  • Calibration integration. The TEDS technology means the microphone is automatically detected and identified by your data acquisition software, allowing it to be easily integrated with your calibration database.
  • Fewer errors. As your data acquisition software automatically knows the microphone type, serial number and sensitivity, manual inputs are greatly reduced – reducing human errors.
Capacitance
pF
Diameter
1/2
Dynamic range
18 – 134 dB
Frequency range
20 – 16000 Hz
Inherent noise
18 dB A
Lower limiting frequency -3dB
12 Hz
Optimised
Diffuse Field
Polarization
Prepolarized
Polarization voltages
V
Pressure coefficient
-0.01 dB/kPa
Sensitivity
50 mV/Pa
Temperature coefficient
-0.006 db/ºC
Temperature range
-20 – 80 C
Venting
Rear
Weight
gram
Sound field
Diffuse-field
Input type
CCLD IEPE
Microphone type
Diffuse Field