A system with high sensitivity, excellent long-term stability, and outstanding corrosion resistance.
1-inch and 1/2-inch microphones adequately cover many noise measurements based on IEC, ISO, and ANSI standards, but there is a growing demand for noise measurements at levels lower than these noise floors. In such cases, Brüel & Kjær's Type 4955 is the optimal choice. It combines a total titanium laser-welded diaphragm and a 1/2" microphone cartridge with optimized self-noise, along with a low-noise preamplifier with a gain of 20dB. As a result, this system is highly sensitive, with excellent long-term stability and outstanding corrosion resistance. The 4955 TEDS microphone has a representative noise level of 5.5dB A-weighted sound pressure level, allowing it to adequately measure up to 10dB A-weighted sound pressure levels. ● For more details, please download the catalog or contact us.
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basic information
【Features】 ○ Sensitivity 1.1V/Pa ○ Guaranteed noise floor below 6.5dB (A-weighted sound pressure level) ○ Slimline, true 1/2 inch solution ○ Frequency response optimized up to 20kHz ○ Maximum sound pressure level 110dB ○ Direct connection to PULSE front end and NEXUS amplifier ○ Built-in overvoltage protection circuit ○ Temperature compensation ○ True omnidirectional response ○ Total titanium construction ○ Excellent long-term stability ● For more details, please download the catalog or contact us.
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For more details, please contact us.
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Applications/Examples of results
○Sound power measurement ○Low noise measurement ○Measurement in the cabin ○Measurement in a strong magnetic field ○Applications in national defense
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Company information
Bruel & Kjaer (Spectris Corporation, HBK Division) will reflect the diligence of Denmark and the innovation of Japan in our products. We aim to bring the experience and wisdom of our Danish headquarters, which has been dedicated to "acoustics and vibration for 75 years," to Japan through Bruel & Kjaer Japan. Additionally, we want to showcase Japan's delicate and advanced technology, which is at a world-class level, to the world through the Bruel & Kjaer Group's network.
