Buzz, Squeak and Rattle Testing

BSR is an acronym for buzz, squeak and
rattle. BSR is a test method by which we can quantify and measure the amount of
noise that parts and sub-systems make while under vibration environment. Today’s consumers have high expectations for their product choices. Car buyers also expect a high level of quality from their vehicles. Consumers want new
vehicles to provide them with a quiet ride even when they drive over uneven
roads. Manufacturers of automotive parts use BSR testing to quantify and when
necessary troubleshoot the causes of automotive parts that make noise while
under simulated road load conditions BSR testing requires three things:
control vibration energy Sound measurement capability and a quiet test environment. BSR vibration energy is usually provided with a quiet electrodynamic shaker. The patented state-of-the-art MB dynamics energizer quiet shaker produces the
vibration energy that we need to perform BSR testing at extremely low noise levels. Some simple BSR tests only require sound level in A-weighted dB or sones to be measured. More demanding tests also require sound quality metricsto be determined while simultaneously monitoring vibration levels on the
device under test. Our sound acquisition system can measure and process data from up to four microphones and ten accelerometers Of course BSR events
are typically very low level phenomenon so the measurements for BSR must be made
in a very quiet environment Our quiet room provides a 35 dB A-weighted or
1.5 sones environment while at test load