Abstract
Active Control of Sound (ACS) has been a promising method
for noise control (Active Noise Control, ANC) and also
for other applications such as active absorption and
active increase of sound transmission loss of partitions.
VTT has developed a new method to manufacture thin, flat
and efficient acoustic sensors and actuators utilizing
ElectroMechanical Film (EMFiT) technology. Sensors and
actuators can be easily implemented in ACS applications,
where large surfaces should be covered with sensors or
anti-sound producing elements.EMFi panel sensors and
actuators are thin elements, which can be collocated
forming an advanced sensor-actuator combination. Using
sensors and actuators together with advanced amplifiers
and JMC-method based control systems it is possible to
create totally new approach for the active control of
sound. Two larger European Union funded research
projects, led by VTT, and several smaller ones, are
focusing on the use of EMFi panel elements in ANC
systems. The principles and some results of the use of
EMFi-technology in active noise control are presented in
this paper. Main application areas are the traditional
ventilation noise control in ducts and the sound
transmission loss increase of panels for the noise
reduction in buildings and in transportation systems (to
reduce noise entering the cabin of cars and trains).
| Original language | English |
|---|---|
| Title of host publication | INTER-NOISE and NOISE-CON Congress and Conference Proceedings, Active99 |
| Publisher | Institute of Noise Control Engineering |
| Pages | 1171- 1182 |
| Number of pages | 12 |
| Publication status | Published - 1999 |
| MoE publication type | B3 Non-refereed article in conference proceedings |
| Event | International Symposium on Active Control of Sound and Vibration, ACTIVE 99 - Fort Lauderdale, United States Duration: 4 Dec 1999 → 6 Dec 1999 |
Conference
| Conference | International Symposium on Active Control of Sound and Vibration, ACTIVE 99 |
|---|---|
| Abbreviated title | ACTIVE |
| Country/Territory | United States |
| City | Fort Lauderdale |
| Period | 4/12/99 → 6/12/99 |