1" Laboratory Standard Microphone

Type 4160 Standard Microphone (together with Type 4180) is a high quality condenser microphone, designed for use as a laboratory standard microphone in laboratory coupler applications, where accuracy and long-term stability are essential.

Type 4160 has been used for some time in such applications and conforms to IEC 327 and 402, ANSI S1.12-1967 and ANSI Sl.lO-1966, JIS C 5515, and the current IEC draft standard for 1-inch laboratory standard microphones. The microphone has become established as a high-precision reference standard, and is used in the medium frequency ranges and for measurements at low sound pressure levels.

USE SCENARIOS

• Laboratory standard microphones
• Pressure and Free Field Reciprocity Calibrations
• Coupler measurements

FEATURES

• Well defined integral front cavities for coupler calibrations
• Low hydrogen leakage from front cavity
• Well-defined operating characteristics
• Flat Frequency Pressure Responses up to: 0: 8kHz 4180: 20 kHz
• Artificially aged for long term stability
• Low sensitivity to environmental changes
• Standards: 4160: ANSI S1.12-1967, ANSI S1.l0-1966 (and revisions), IEC 327 and 402, JIS C 5515, and IEC draft standard for 1-inch laboratory standard microphones type LS1 P

Both Type 4160 and 4180 Standard Microphones are designed for coupler applications and can be used with couplers filled with gases other than air as they both feature very low gas leakage from the front cavity. The main difference is that Type 4160 is externally polarized and operate on a polarization voltage of +200 Volts.

Both Microphones are delivered with individual calibration charts

TYPE 4180 LABORATORY MICROPHONE

Type 4180 has been developed to meet a growing need for a laboratory standard ½-inch microphone which enables measurements at higher frequencies and at higher sound pressure levels.

Standard specifications for ½-inch laboratory standard microphones are under consideration and the 4180 has been designed to comply with the most recent drafts of these standards.