Bruel & Kjaer 4220 Pistonphone
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Bruel & Kjaer 4220 is a precision pistonphone calibrator for sound level meters, offering 124 dB SPL at 250 Hz with ±0.15 dB calibration accuracy.
Product details
| Model | 4220 |
| Manufacturer | Bruel & Kjaer |
| Category | Sound Level Meters |
| Availability | Made to order |
Description
Overview
The Bruel & Kjaer 4220 is a precision pistonphone calibrator designed for calibrating sound level meters in the field. It produces a stable acoustic signal at a precise sound pressure level, making it essential for maintaining measurement accuracy in acoustic testing and monitoring applications.
Key Features
- Sound pressure level: 124 dB SPL at 250 Hz
- Calibration accuracy: ±0.15 dB
- Fits 1, 1/2, 1/4, and 1/8 inch microphones
- Battery operated for field use
- High frequency and level stability
- Individually calibrated to within ±0.12 dB
- Complies with IEC 942 (1988) Class 1L or Class 0L and ANSI S1.40-1984
Applications
- Sound level meter calibration
- Field acoustic measurements
- Laboratory sound testing
Specifications
| Sound Pressure Level | 124 dB SPL at 250 Hz |
| Calibration Accuracy | ±0.15 dB |
| Individual Calibration | ±0.12 dB |
| Microphone Compatibility | 1, 1/2, 1/4, 1/8 inch |
| Power Source | Battery |
| Standards | IEC 942 (1988) Class 1L/0L, ANSI S1.40-1984 |
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Bruel & Kjaer 4220 Pistonphone
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