In order to discriminate different industrial machine sounds contaminated with perturbations (high noise, speech, etc.), a spectral analysis based on a structural pattern recognition technique is proposed. This approach consists of three steps: 1) to de-noise the machine sounds using the Morlet wavelet transform, 2) to calculate the frequency spectrums for these purified signals, and 3) to conv...

Studies over the past few years have clearly shown that noise levels are rela tively high on tractors, and other farm machinery, and that farmers as a group suffer from noise induced hearing loss (3, 5, 6). Evidence is increasing that noise may also affect man's non-auditory systems and his psychological state (4), but much less research work has been done on this subject, especially at the far...

There are indications that, given a certain level of noise exposure, the expected annoyance by wind turbine noise is higher than that by noise from other sources such as industrial noise or transportation noise. The aim of the present study was to establish the exposure-response relationship between wind turbine noise exposure and the expected percentage annoyed residents on the basis of availa...