Bruel-Kjaer – 51.8 dB

The Bruel-Kjaer 51.8 dB Condenser Microphone is a professional-grade acoustic measurement instrument engineered for applications requiring a broad frequency response and exceptional precision. Designed with a compact 1/4″ diameter, it provides a frequency range of 0–100 kHz, making it ideal for both standard and high-frequency acoustic analysis.

With a sensitivity of 4 mV/Pa and a 51.8 dB signal-to-noise ratio, the Bruel-Kjaer 51.8 dB Condenser Microphone delivers accurate, low-noise performance across the entire frequency range. This capability ensures reliable measurements in both laboratory and field environments, supporting applications such as noise source identification, high-frequency acoustic research, and precision audio testing.

The rugged construction of the Bruel-Kjaer 51.8 dB Condenser Microphone ensures long-term stability and durability. Its stainless steel housing protects the precision diaphragm from environmental factors, while the advanced condenser capsule design provides a flat and stable frequency response.

Thanks to its high bandwidth, this microphone is particularly suited for ultrasonic and transient sound measurements, as well as detailed analysis of mechanical vibrations and structural acoustics. It is fully compatible with Bruel-Kjaer preamplifiers and measurement systems, ensuring seamless integration into existing setups.

Key applications include:

• High-frequency acoustic testing (up to 100 kHz)

• Environmental and industrial noise assessment

• Ultrasonic research and development

• Audio equipment testing and calibration

• Structural vibration and impact noise measurement

As part of Bruel-Kjaer’s renowned product range, the 51.8 dB model is manufactured to exacting standards, ensuring compliance with international measurement requirements. This guarantees accuracy, repeatability, and consistency across different measurement scenarios.

By offering high precision, wide frequency coverage, and robust build quality, the Bruel-Kjaer 51.8 dB Condenser Microphone provides professionals with the reliability needed for demanding acoustic measurement tasks. Whether used in a controlled lab environment or challenging field conditions, it consistently delivers accurate, actionable data that supports critical engineering and research decisions.