Noise reduction in material-handling machines

✍ Scribed by S. Vajpayee; M.M. Nigm; M.M. Sadek

• Publisher: Elsevier Science
• Year: 1981
• Tongue: English
• Weight: 281 KB
• Volume: 14
• Category: Article
• ISSN: 0003-682X
• DOI: 10.1016/0003-682x(81)90005-0

✦ Synopsis

Three case studws of mdustrtal noise control relatmg to two materlal-handhng systems and a press are presented Each one mvolves basehne measurements, identification of malor noise sources, development and Implementation of appropriate design modifications and/or acoustic treatments followed by assessment of their effectweness Smce the noise from these machines is of an impulsive nature the basehne measurements are carried out with an tmpulswe SLM For diagnostic purposes, however, the noise signals were recorded on site and analysed later on a mint-computer The existing noise level ~as found to be in the range 100-110 dB(A), ma)or peaks appearmg m the 1-3 k Hz band The roam sources of noise are the ratthng of the components under ppoductton m the conveyer systems and thelr impacts m the various bins The wbrator units also emit slgmficant nozse The problems were remedied by reducing the drop height and chute slope Also, a fin system, made oJ acoustic material, has been designed so that the falhng components lose some of thew kmetw energy by tmpactmg on the fins A noise abatement of 10-15dB(A) was achieved at minimal cost