LMS International have released a new battery powered instrument called SCADAS 305, for noise and vibration measurements. The instrument has 4 to 20 input channels.
Read more on the LMS International web site.
LMS releases Test Lab Revision 4
LMS International have announced the release revision 4 of their LMS Test.Lab at the 2003 edition of the SAE Noise & Vibration Conference.
Read more on the LMS International web site.
Telaid makes ceiling tiles for speech privacy
Telaid in conjunction with Acentech have developed a product called Zone II, which is speaker that makes a low-level mashing noise to drown out background speech which is intended to provides “speech privacy.” There are several new laws that have come into effect that require health care and financial service companies to provide privacy when discussing details with customers. The kit contains 4 speakers that can be installed behind a ceiling tile and provides coverage for about 400 square feet.
Bombardier make aircraft with ANVC
Bombardier make turbo-prop aircraft in their Q-series that have an active noise and vibration control system to reduce the noise level inside the cabin. Their Noise and Vibration Suppression System (NVS) uses actively controlled tuned vibration absorbers attached to the fuselage to reduce the vibration, and hence reduces the noise transmitted into the cabin. The system was designed by Ultra-electronics.
Read more on the Bombardier web site.
Analog Devices extends accelerometer product family
Analog Devices has added more MEMs accelerometers to its product range. The ADXL203 is a two axis, low G accelerometer and the ADXL103 is the single axis version. Both accelerometers have a range of +/- 1.7 g and can measure both static and dynamic acceleration.
Read more on the Analog Devices web site.
New software from B&K
Bruel and Kjaer have release two new software packages. Acoustic Determinator Type 7816 is a tool to calculate the sound power level of sources by measuring sound pressure levels in the field. Classifier is a PC-based software package for laboratory or field measurements of building acoustics using Brüel & Kjær’s PULSE version 7.x.
Pavement testing machine used to measure road noise
The Institute for Safe, Quiet, and Durable Highways(SQDH), at the Ray Herrick Laboratories at Purdue University has built a device to test the noise generated from pavement – tire interaction. The pavement is attached to a circular drum and a tire rotates over the curved pavement surface.
Read more on the Purdue University web site.
Lord put AVC system in a helicopter
Lord Corporation, North Carolina USA, have successfully installed an Active Vibration Control system in the Hindustan Aeronautics Advanced Light Helicopter, otherwise known as the Indian DHRUV. The system uses active Frahms to monitor and reduce vibration in the fuselage generated by the main rotor and the rotor aerodynamics.
Read the press release on the Lord Corporation web site.
ENC Noise control software updated
Causal Systems has released the latest version of ENC, Engineering Noise Control software. The software evaluates practically all of the expressions and algorithms in the book, Engineering Noise Control 2nd edition by
DA Bies and CH Hansen.
Order the software from Causal Systems.
On wafer testing of MEMS devices
Suss MicroTec and DELTA (Danish Electronics, Light and Acoustics) have created a website called Memunity that is dedicated to testing of microelectromechanical systems (MEMS). MEMUNITY and its members have techniques for testing MEMS accelerometers and microphones whilst they are still on the wafer.
Read more on the MEMUNITY web site.