Disturbing noise is a growing problem in the society. Also in the home environment noise making devices exist, for example the vacuum cleaner. A simple way to decrease the annoyance from a vacuum cleaner is to use personal passive ear defenders. A problem with passive ear defenders is that they also attenuate wanted signals, such as speech or music. In this thesis a pair of prototype active ear defenders for vacuum cleaner noise attenuation have been developed and evaluated. Active noise control technology was used, which solved the problem with wanted signal attenuation. A measured noise reference was used with a pair of open earphones as actuator. The overall cancellation performance of the prototype system was quite low for vacuum cleaner noise. Due to that the coherence between the measured noise reference and the unwanted noise was low. Wanted signals were shown to be just slightly affected by the prototype system.
| Identifer | oai:union.ndltd.org:UPSALLA1/oai:DiVA.org:kth-109486 |
| Date | January 2003 |
| Creators | Rybing, Peter |
| Publisher | KTH, Reglerteknik |
| Source Sets | DiVA Archive at Upsalla University |
| Language | English |
| Detected Language | English |
| Type | Student thesis, info:eu-repo/semantics/bachelorThesis, text |
| Format | application/pdf |
| Rights | info:eu-repo/semantics/openAccess |
Page generated in 0.0118 seconds