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008250610e197708##oncd    ob   f|0| 0 eng d
040 |aCaOODSP|beng|erda|cCaOODSP
043 |an-cn---
0861 |aD68-25/8-1977E-PDF
1001 |aForshaw, S. E., |eauthor.
24510|aListening for machinery malfunctions in noise while wearing ear muffs / |cS.E. Forshaw.
264 1|aDownsview, Ontarrio : |bBehavioural Division, Defence Civil Institute of Environmental Medicine, Department of National Defence, Canada, |cAugust, 1977.
300 |a1 online resource (v, 13, [11] pages) : |bcharts.
336 |atext|btxt|2rdacontent
337 |acomputer|bc|2rdamedia
338 |aonline resource|bcr|2rdacarrier
4901 |aDCIEM technical report ; |vNo. 77X43
500 |aDigitized edition from print [produced by Defence Research and Development Canada].
504 |aIncludes bibliographical references.
520 |a"It is generally believed by personnel who work in ships' engine and boiler rooms that the noise attenuation provided by an effective ear muff will adversely affect their ability to detect those sounds that indicate real or potential machinery malfunction. Studies conducted with persons listening to speech or pure tones in noise suggest, however, that for normal-hearing persons in noise levels above 80 dB, ear muffs are probably not detrimental to the above listening task"--Abstract, page v.
650 0|aPersonal protective equipment.
650 0|aEarmuffs.
650 0|aShips|xNoise.
650 6|aVêtements de protection.
650 6|aCouvre-oreilles.
650 6|aNavires|xBruit.
7102 |aDefence and Civil Institute of Environmental Medicine (Canada), |eissuing body.
7101 |aCanada. |bDepartment of National Defence, |eissuing body.
830#0|aDCIEM technical report ;|vNo. 77X43.|w(CaOODSP)9.943618
85640|qPDF|s735 KB|uhttps://publications.gc.ca/collections/collection_2025/rddc-drdc/D68-25-8-1977-eng.pdf