Bruel & Kjaer 4228 Pistonphone
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Bruel & Kjaer 4228 Pistonphone is a laboratory-grade acoustic calibrator producing 124 dB SPL at 250 Hz, meeting IEC 942 (1988) Class 1L and ANSI S1.40-1984 standards.
Product details
| Model | 4228 |
| Manufacturer | Bruel & Kjaer |
| Category | Sound Level Meters |
| Availability | Made to order |
Description
Overview
The Bruel & Kjaer 4228 Pistonphone is a laboratory-standard acoustic calibrator designed for quick and accurate calibration of sound measuring equipment including sound level meters and other acoustic instruments. It provides a standard sound pressure level output and maintains high accuracy across a wide range of temperature, humidity, and pressure conditions, making it suitable for both field and laboratory use.
Key Features
- Sound pressure level: 124 dB SPL at 250 Hz
- Laboratory standard calibrator
- High frequency and level stability
- Individually calibrated to within ±0.12 dB
- Compatible with 1-inch, ½-inch, ¼-inch, and ⅛-inch microphones
- Battery operated for portable field use
- Meets IEC 942 (1988) Class 1L (with included barometer) and Class 0L (with external barometer)
- Meets ANSI S1.40-1984 standard
Applications
- Calibration of sound level meters in laboratory and field settings
- Verification of sound measurement equipment accuracy
- Periodic calibration checks of acoustic instrumentation
Specifications
| Sound Pressure Level | 124 dB SPL at 250 Hz |
| Calibration Accuracy | ±0.12 dB (including microphone effects) |
| Microphone Compatibility | 1-inch, ½-inch, ¼-inch, ⅛-inch |
| Power Source | Battery operated |
| Standards Compliance | IEC 942 (1988) Class 1L/Class 0L, ANSI S1.40-1984 |
| Barometer | Included (Class 1L) or external (Class 0L) |
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Bruel & Kjaer 4228 Pistonphone
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