Bruel and Kjaer 4204 Overview

Reference Sound Source Type 4204 is a calibrated source of sound power with well defined operating characteristics and a predictable performance. It is rugged, compact and stable, and is therefore suitable for both field and laboratory use.

Features:

• Fulfils ISO 3741, ISO 3747 and ISO 6926 for calibrated sound power sources
• Frequency range from 100Hz to 20 kHz
• Sound power output 91 dB re 1 pW (A-weighted, 50 Hz line frequency) and 95 dB re 1 pW (Aweighted, 60 Hz line frequency)
• Temperature range –10°C to + 50°C
• 50 and 60 Hz operation
• Long-term stability
• Individual calibration chart supplied
• Compact and rugged
• Fitted with safety grid

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