Multifunction calibrator 4226

sound levelacousticfor sound level meters

Overview
HBK Type 4226 is a multifunction acoustic calibrator designed to generate stable sound pressure for microphone calibration across a wide frequency range. It supports free-field and diffuse-field simulation, includes a 12.5 kHz signal source, and provides mechanical coupling for ½" and ¼" microphones as well as electrical output for measurements.

Key functions

• Generate stable sound pressure for precise microphone calibration
• Simulate free-field and diffuse-field calibration conditions
• Provide test signal for ½" and ¼" microphones and electrical output
• Support external generator connection for frequency scans or semi-automated tests

Typical applications

• Calibration of measurement microphones (½" and ¼") in laboratory and field
• Verification and validation of sound level meters and acoustic transducers
• Quality control, research & development, and compliance testing of acoustic instruments

Technical characteristics / specifications

• Model: Type 4226
• Brand: HBK
• Product type: Multifunction acoustic calibrator
• Frequency range: 31.5 Hz to 16 kHz (includes 12.5 kHz signal)
• Supported microphone sizes: ½" and ¼"
• Coupling: mechanical coupler supplied; electrical output available
• Calibration modes: free-field and diffuse-field simulation
• Standards: EN/IEC 60942, ANSI S1.40, IEC 60651, ANSI S1.4-1983; supports verification per IEC 61672