Abstract
This paper presents the results of infrasonic noise measurements performed at various workplaces in industry and transportation in Poland. The study concerned noise emitted by 124 different types of machinery, appliances and means of transport. The measurements were made under typical conditions of work and with reference to the Polish Standard PN-86/N–01338 and international standards ISO 7196 and ISO 9612. According to PN–86/N–01338, within 1/1 octave bands 8 – 31.5 Hz, acoustic pressures exceeding the admissible levels for (a) workers' health protection were found in 5 (4.0%) cases, (b) proper conditions for performing basic functions in observational dispatcher cabins etc. – in 77 (62.1%) cases; (c) premises for administration, design offices etc. – in 92 (74.2%) cases. The hearing threshold was exceeded by 66.9% of all the machinery under study.
Get full access to this article
View all access options for this article.