Measurement microphone 4942

prepolarized1/2"random incidence

Overview
The Family 4942 is a prepolarized 1/2-inch diffuse-field microphone designed for precise random-incidence noise measurements and compliance with applicable ANSI requirements. It is intended for environmental, laboratory and in-situ acoustic testing where diffuse-field response is required.

Key features

• Prepolarized 1/2-inch diffuse-field microphone
• Optimized for random-incidence noise measurements
• Designed to meet relevant ANSI random-incidence measurement requirements
• Shown/used with 1706 preamplifier (compatibility indicated)

Application

• Random-incidence / diffuse-field noise measurements
• Environmental and industrial noise monitoring
• In-vehicle (in-car) and laboratory acoustic testing

Variants / Models (excerpt)
-4942-A-021- | CCLD | 20 Hz | 18 dB | 134 dB | 80 °C
-4942-A-031- | CCLD | 6.3 Hz | 18 dB | 130 dB | 80 °C
-4942-B-001- | Classic | 6.3 Hz | 15.2 dB | 146 dB | 80 °C
-4942-C-001- | Classic | 6.3 Hz | 15.2 dB | 146 dB | 80 °C
-4942-H-041- | CCLD | 6.3 Hz | 18 dB | 134 dB | 125 °C

Accessories

• Microphone preamplifiers Type 2669 series (e.g. -2669-B--, -2669-C--, -2669-L--)
• CCLD / IEPE preamplifier Type 1706
• Acoustic calibrators: pistonphone Type 4228, Class 1 acoustic calibrator Type 4231
• Adapters and windshields (e.g. UA-0459)

Documents available (excerpt)

• Data sheets and TEDS files
• Calibration and compliance documentation (ANSI/IEC references)

Technical specifications

• Standard: IEC 61094
• Type: Prepolarized diffuse-field microphone, 1/2-inch
• Frequency range: lower cutoff 6.3 Hz or 20 Hz (variant dependent), upper frequency 16 kHz
• Sensitivity: typ. 50 mV/Pa
• Dynamic range: low typ. 15.2 dB; high typ. 130–146 dB (variant dependent)
• Diameter: 1/2 inch
• Venting: rear
• Operating temperature: -20 °C to 80 °C or up to 125 °C (depending on variant)
• Output / connectivity: passive, compatible with CCLD preamplification