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General| Brand | BRUEL & KJAER |
|---|---|
| Model | 4220 |
| Category | Measuring Instruments |
| Language | English |
Overview of the Pistonphone Type 4220's physical characteristics and basic operation.
Explanation of the Pistonphone's core mechanism involving pistons and cavity volume variation.
Details on piston design, materials, and factors contributing to non-linear distortion.
Description of the coupler design and various adaptors for microphone compatibility.
Explanation of the DC motor drive and regulation system for frequency stability.
Information on the battery power source, types, and compartment.
Details on the barometer used for correcting pressure variations in calibration.
Step-by-step guide for using the Pistonphone for calibration.
Methods for applying corrections for ambient pressure and coupler volume changes.
Instructions for using an external DC power supply to vary frequency.
Procedures for disassembling and reassembling the Pistonphone unit.
Procedure for calibrating a Precision Sound Level Meter Type 2203.
Calibrating B&K amplifiers, analyzers, and spectrometers with the Pistonphone.
Establishing a reference level for sound level recordings and spectrograms.
Using the Pistonphone for calibrating sound measurements on magnetic tape.
