Department of Vibroacoustic Hazards - Projects
Projects List
201920182017
Development and implementation of procedures for measuring the efficiency of noise attenuation in various solutions of hearing protectors fitted with electronic facilities
Development and implementation of procedures for testing and assessing the acoustic properties of hearing protectors in real-world exposure to noise
Identification and assessment of hazards posed by dangerous and harmful factors at workstations in the construction industry, and the development of prevention recommendations
Development of the principles of monitoring exposure to harmful and strenuous factors in the working environment that meet European Union standards within the activity of the European Foundation for the Improvement of Living and Working Conditions (Dublin)
Modelling machinery and equipment from the perspective of minimalization of vibroacoustic activity
Inversion in programming noise emitted from machinery and equipment
Experimental tests and an assessment of the influence of the vibrations of the elements of layer noise protections on their sound insulation properties
Tests and assessment of efficiency of attenuating impulse noise with earplugs
Investigating the influence of the construction of earmuffs on the efficiency of attenuating impulse noise
Abstract

Inversion in programming noise emitted from machinery and equipment

Project manager: Prof. Zbigniew Engel Ph.D. (Eng.), D.Sc. (Eng.)

Project summary:

The distribution of the acoustic field around a 1JS60 air compressor was investigated. The measurements were done at 197 points distributed on a hemisphere with the radius of 1.5 m. The amplitude and the phase of sound pressure in the range from 0 do 1600 Hz were determined at every measurement point.The source of vibroacoustic energy in selected machinery, using a planing/sawing machine as an example, was identified. The main sources of vibroacoustic energy were identified with the use of the reciprocity method and the inversion method.Acoustic parameters determined with the inversion method and the reciprocity method, using a planing/sawing machine and a press as examples, were compared. Also compared were methods of determining acoustic parameters of machinery with the ray method of inversion and the intense method of inversion. The magnitude of the errors was established as well as their possible sources were defined.

Unit: Department of Vibroacoustic Hazards

Duration: 01.01.2002 – 30.11.2004