SOUND AND VIBRATION CONTROL METHODOLOGY BASED ON SOURCE AND PATH IDENTIFICATION ON HOUSEHOLDS REFRIGERATORS
This paper presents a methodology to identify and control the main noise sources and paths on refrigerators. The methodology consists on the split the mechanical system into three different groups: sources, transmission paths and radiators. Some investigation techniques, like acoustics holography, operating deflection shapes, modal analysis and compressors measurements (vibration, gas pulsation and sound power) were used to investigate the contribution of each group and its interaction. This technique allows creating an energy flow map and so identifies sources, paths and its respective influences on the final sound radiation performance. Sound Quality tools (Psychoacoustics metrics, loudness, sharpness and jury analysis) were used to validate the proposed solution. The holography technique to identify sources is explored and a typical application example of this methodology is showed for a household refrigerator.
E.BAARS O.SANTINI
Embraco, Rua Rui Barbosa, 1020 Joinville, 89219-901, Santa Catarina, Brazil
国际会议
The 22nd International Congress of Refrigeration(第22届国际制冷大会)
北京
英文
2007-08-21（万方平台首次上网日期，不代表论文的发表时间）