Enclosed spaces, health and infrasound
Type of Spiritual Experience
This paper shows it is the enclosed space such as the tractor cab, lorry driver's cab, train driver's cab or heavy machinery operator's cab that generates the infrasound that both affects health and produces mental effects from depression to dissociative experiences
A description of the experience
Med Pr. 1998;49(6):545-61. [Evaluation of occupational exposure to infrasonic noise]. [Article in Polish] Pawlaczyk-Luszczyńska M. Zakładu Zagrozeń Fizycznych, Instytutu Medycyny Pracy im. prof. dra med. Jerzego Nofera w Lodzi.
This papers 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 Polish norm PN-86/N-01338 and international norms ISO 7196:1995 and ISO 9612:1997.
According to PN-86/N-01338, within octave bands of 8 divided by 31.5 Hz, the acoustic pressure 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; and
(c) premises for administration, design offices, etc.--in 92 (74.2%) cases.
The hearing threshold was exceeded in 66.9 of all the machinery under study.