TYPE 4944-B

¼-inch pressure-field microphone, 4 Hz to 70 kHz, 1.0 mV/Pa

Designed to be used in small closed couplers, close to hard reflective surfaces or flush-mounted. With 10-32 UNF connector.

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Type 4944-B is designed to be used in small closed couplers, close to hard reflective surfaces or flushmounted. It is a ¼" prepolarized pressure-field microphones laser welded to ¼" CLD preamplifiers. The preamplifier connects to CCLD input conditioning and supports IEEEP1451.4V 0.9 TEDS (Transducer Electronic Data Sheet).

USE SCENARIOS

  • High-level measurements
  • High-frequency measurements
  • Flush mounting
  • Arrays in wind tunnels

DESIGN AND ROBUSTNESS

The shape of the microphone front ensures excellent microphone performance when flush-mounted. The laser-welded diaphragm on the microphone housing ensures that the sensitivity is resistant to rough handling during flush mounting.

MICROPHONE DAT CD

The microphone is supplied with a mini-CD. This mini-CD carries all individual calibration data as well as random-incidence and free-field corrections. The influence of ¼ Nose Cone UA-0385 is also available.

CALIBRATION

The sensitivity can be calibrated at 250Hz using Pistonphone Type 4228 with ¼" adaptor DP-0775. The pressure-field response can be measured using Actuator UA-0033 with Adaptor DB-0264. The pressure-field response is equal to the actuator response.

Capacitance
pF
Diameter
1/4
Dynamic range
48 – 169 dB
Frequency range
16 – 70000 Hz
Inherent noise
48 dB A
Lower limiting frequency -3dB
16 Hz
Optimised
Pressure Field
Polarization
Prepolarized
Polarization voltages
V
Pressure coefficient
-0.003 dB/kPa
Sensitivity
0.9 mV/Pa
Temperature coefficient
0.009 db/ºC
Temperature range
-20 – 100 C
Venting
Side
Weight
gram
Sound field
Pressure-field
Input type
CCLD IEPE
Microphone type
Pressure Field