½" DIFFUSE-FIELD / RANDOM INCIDENCE MICROPHONE
Externally polarized, diffuse-field microphone designed for random-incidence measurements over 3.15 Hz to 10 kHz, and is approved for noise measurements in accordance with ANSI standards.
TYPE 4943
Type 4943 is optimised for general, random-incidence measurements and for noise measurements in accord?ance with ANSI standards. Being externally polarized, it must be used with a classical preamplifier
| Diffuse-field ½-inch Microphone Type 4943 Datasheet (bp1876) | Data Sheets | English |
| Standard | ANSI S1.4 |
| Sound field | Diffuse field |
| Polarization voltage | 200V |
| Sensitivity | 50 mV/Pa |
| Lower limiting frequency | 3.15 Hz |
| Higher limiting frequency | 10 kHz |
| Inherent noise | 15.5 dB(A) |
| Upper limiting of dynamic range | 148 dB |
| Diameter | 1/2 inch |
| Venting | Rear |
| Minimum Temperature | -40 °C |
| Maximum Temperature | 150 °C |
| Minimum Temperature | -40 °F |
| Maximum Temperature | 302 °F |
A diffuse-field microphone, also called a random-incidence microphone, is designed to have a uniform response when signals arrive simultaneously from all angles.
They should therefore not only be used for measurement in reverberation chambers, but in all situations where the sound field is diffuse, or where several sources are contributing to the sound pressure at the measurement position.
Practical examples are indoor situations, where the sound is reflected by walls, ceilings, and objects in the room, or measurements inside a car.
The microphone is capable of withstanding the IEC 68-2-32 1 metre drop test.
The sensitivity can be calibrated at 250 Hz by using Pistonphone Type 4229 with our ½-inch Adaptor DP 0776, or at 1 kHz using Sound Calibrator Type 4231. For other frequencies, we recommend using Multifunction Acoustic Calibrator Type 4226.
The actuator response can be measured using Actuator UA-0033.
The random-incidence response can be obtained by adding the type-specific, random-incidence correction to the actuator response.
This will bring together HBM, Brüel & Kjær, nCode, ReliaSoft, and Discom brands, helping you innovate faster for a cleaner, healthier, and more productive world.
This will bring together HBM, Brüel & Kjær, nCode, ReliaSoft, and Discom brands, helping you innovate faster for a cleaner, healthier, and more productive world.
This will bring together HBM, Brüel & Kjær, nCode, ReliaSoft, and Discom brands, helping you innovate faster for a cleaner, healthier, and more productive world.
This will bring together HBM, Brüel & Kjær, nCode, ReliaSoft, and Discom brands, helping you innovate faster for a cleaner, healthier, and more productive world.
This will bring together HBM, Brüel & Kjær, nCode, ReliaSoft, and Discom brands, helping you innovate faster for a cleaner, healthier, and more productive world.
This will bring together HBM, Brüel & Kjær, nCode, ReliaSoft, MicroStrain and Discom brands, helping you innovate faster for a cleaner, healthier, and more productive world.
