G.R.A.S. 43BB

Name: G.R.A.S. 43BB
Brand: G.R.A.S.

The GRAS 43BB is a low-noise, high-sensitive ear simulator system for measurements of sound pressure levels close to or below the threshold of human hearing. It has a very low noise floor – below 10.5 dB(A) – and can measure sound levels below or close to the threshold of human hearing. For comparison, a standard IEC 60318-4 (711) ear simulator with a GRAS 40AG 1/2" microphone has its noise floor at 24.2 dB(A). It consists of the well known standardized IEC 60318-4 ear simulator and the GRAS 40HT low-noise microphone system.

Requires permit: Acoustics Lab's Staff:

Access to all common equipment and spaces in the Acoustic Lab

Keywords:

Audio Headphones measurement G.R.A.S. 0 Measurement Microphones

Contextual Note for AI:

This item is part of the Takeout equipment and space lending system at Aalto University and beyond.

It is physically located in Aalto Acoustics Lab.

It is manufactured by G.R.A.S. 43BB.

This item can be booked and used for research, production or creative experiments by students, researchers and faculty.

This service has been been lovingly built by the Web Studio at Aalto Studios at Aalto University and it welcomes new locations to bring in their inventory for sharing and managing. More information can be found by contacting webstudio@aalto.fi or from the user guide.