Abstract
Acoustic sensors are an important part in an active noise
control system in ducts. Flush mounted or wire suspended
pressure microphones are commonly used sensors to both
detect the primary sound field and to measure the
remaining error signal. Such sensors detect the sound
pressure at a single point. They operate adequately if
the duct properties are close to the ideal ones and the
propagating wave is a plane wave. If the duct differs
from the ideal one or the operating frequency range is
above the first diametrical mode, large area sensors or
sensor arrays are beneficial for detecting the
propagating wave. We modeled and simulated the
propagation of sound in a semiinfinite duct and the
influence of the sound on the sensors. We used the
regular laboratory pressure microphones as references and
we also constructed circular sensors. The operation of
the sensors was measured and the results analyzed.
| Original language | English |
|---|---|
| Title of host publication | Internoise 2001: Proceedings of the 2001 International Congress and Exhibition on Noise Control Engineering |
| Publisher | Institute of Noise Control Engineering |
| Pages | 1608-1611 |
| Number of pages | 4 |
| ISBN (Print) | 90-806554-3-0, 90-806554-2-2 |
| Publication status | Published - 2001 |
| MoE publication type | B3 Non-refereed article in conference proceedings |
| Event | International Congress and Exhibition on Noise Control Engineering, Inter-Noise 2001 - The Hague, Netherlands Duration: 27 Aug 2001 → 30 Aug 2001 |
Conference
| Conference | International Congress and Exhibition on Noise Control Engineering, Inter-Noise 2001 |
|---|---|
| Country/Territory | Netherlands |
| City | The Hague |
| Period | 27/08/01 → 30/08/01 |