Abstract
Abstract An innovative technique based on beamforming is implemented, at the aim of detecting the distances from the observer and the relative positions among the noise sources themselves in multisource noise scenarios. By means of preliminary activities to assess the optical camera focal length and stereoscopic measurements followed by image processing, the geometric information in the source-microphone direction is retrieved, a parameter generally missed in classic beamforming applications. A corollary of the method consists of the possibility of obtaining also the distance among different noise sources which could be present in a multisource environment. A loss of precision is found when the effect of the high acoustic reflectivity ground interferes with the noise source.
Highlights
An innovative technique based on beamforming is implemented, at the aim of detecting the distances from the observer and the relative positions among the noise sources themselves in multisource noise scenarios
By means of preliminary activities to assess the optical camera focal length and stereoscopic measurements followed by image processing, the geometric information in the sourcemicrophone direction is retrieved, a parameter generally missed in classic beamforming applications
A corollary of the method consists of the possibility of obtaining the distance among different noise sources which could be present in a multisource environment
Summary
Abstract: An innovative technique based on beamforming is implemented, at the aim of detecting the distances from the observer and the relative positions among the noise sources themselves in multisource noise scenarios. A corollary of the method consists of the possibility of obtaining the distance among different noise sources which could be present in a multisource environment. Limiting to the environment noise, large industrial plants are usually characterized by many sound sources which emissions vary in space and time, having different frequency spectra and characteristics (e.g., presence of impulsive or tonal components). The set of these sources contributes to the global noise level emitted by the plant and received by the surrounding buildings and workplaces, which must comply with the national legal limits. Common sound level meters are not suitable for this purpose and other techniques, such as sound intensity, are of limited use for implants of large scale
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