Array Microphone (20 KHZ)

Type 4958 is a ¼" prepolarized microphone suited for use in systems requiring a large number of microphones, for example, beamforming arrays, STSF measurements, and non-stationary STSF measurements.

The 20 kHz Array Microphone provides excellent amplitude and phase-matching over a wide frequency range, in varying temperatures and humidity.

USE SCENARIOS

• Measurements using:– Spatial Transformation of Sound Fields (STSF) Type 7688– Non-stationary STSF Type 7712– Beamforming Type 7768
• Hand-held array measurements
• Simultaneous recording of time signals in medium to large microphone arrays, for example, simulated pass-by measurements
• Cost-effective, in-car measurements

The TEDS (Transducer Electronic Data Sheet) contains information about the complex transfer function, hence enabling applications to calculate corrections for the individual transducer, resulting in more precise measurements. The microphone preamplifier is of the industry standard CCLD (constant current line drive) type for use with a cheap coaxial cable for signal, a power supply, and TEDS.

A rugged protection grid provides an integrated heat shield. The microphone is front-vented for pressure equalization.

Type 4958 is a precision array microphone offering extended TEDS and excellent phase matching and amplitude linearity over a wider frequency range compared to the 10 kHz Array Microphone Type 4957.