6-cc Coupler, NBS 9A for Testing Earphones

Standardized 6 cc (NBS 9A) acoustic coupler for electroacoustic testing of earphones. Designed for use with a standard 14 mm coupler microphone to provide accurate and repeatable acoustic measurements.

Description

The 6 cc Coupler (NBS 9A) provides a standardized 6 cm³ acoustic cavity for electroacoustic testing of supra-aural earphones and similar transducers. Designed for use with a standard 14 mm coupler microphone, it provides a controlled acoustic load for accurate and repeatable measurements of sound pressure level, frequency response, and other electroacoustic performance characteristics. Precision-machined from aluminum for long-term stability and durability, the 6 cc Coupler is ideal for laboratory, production, calibration, and research applications.