1/2" prepolarized condenser microphone (free-field) with buit-in TEDS preamplifier
5 - 20 kHz, 1.1 V/Pa | Type 4955 Bruel and Kjaer

Although standard 1-inch and ½-inch microphone solutions adequately cover the majority of noise measurements under IEC, ISO and ANSI standards, there is an increasing need for measurements below the noise floor of the standard solutions.

In these cases, Brüel & Kjær’s Type 4955 is the optimal choice. A ½-inch all-titanium, noise-optimised microphone cartridge with laser-welded diaphragm, is combined with a low-noise preamplifier with 20 dB gain. The result is a system with low noise, high sensitivity, excellent long-term stability and outstanding corrosion resistance.

Type 4955 TEDS microphone has a noise floor typically less than 5.5 dB (A), hence allowing measurements well below 10 dB(A).