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pro vyhledávání: '"R.A. Umunnah"'
Publikováno v:
European Scientific Journal, ESJ. 12:231
Acoustic and physical parameters of machines at Ikot Uduak timber market in Calabar, Cross River State, Nigeria were measured using a sound level meter and a real time frequency analyzer. The sound level meter was Mastech model MS6700. This has 30dB
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6f83c77d6e2497e729c0be1d2a95d803
https://doi.org/10.19044/esj.2016.v12n15p231
https://doi.org/10.19044/esj.2016.v12n15p231
