1/4" Pressure-field Microphone With CCLD DeltaTron Preamplifier

Type 4944-A is designed to be used in small closed couplers, close to hard reflective surfaces or flush mounted. It is a ¼-inch prepolarized pressure-field microphones laser welded to ¼-inch CCLD 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 DATA 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-inch Nose Cone UA-0385 is also available.

CALIBRATION

The sensitivity can be calibrated at 250 Hz using Pistonphone Type 4228 with ¼-inch 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.