Harmfulness of the Chain-saw Noise

Assessment of Impulse Noise regarding Harmfulness to Hearing

For prevention or for compensation cases, a simple assessment of intensive impulse noise is needed. In order to choose the most appropriate frequency weighting, the transfer function from the free sound field (where we measure) to the inner ear (where damage occurs) must be taken into account. Regarding the most appropriate time constant, the reaction of the inner ear is the reference, and many...

Vascular responses in chain saw operators.

The intensive use of chain saws is associated with development of the hand-arm vibration syndrome (vibration white finger). Objective testing for cold induced vasospasm was carried out on the fingers of 12 chain saw operators and 12 matched control men from a similar working environment. Two of the chain saw operators tested positive for vasospasm in the laboratory and another three had an abno...

Body reactions during chain saw work.

Body reactions during chain saw work were studied in 14 subjects. The subjects divided into three groups (control, sulpiride, and propranolol) successively cut down logs with a chain saw for seven minutes. The start of the sawing led to a pronounced increase in heart rate which persisted during the sawing. The groups taking sulpiride and propranolol showed a smaller increase in heart rate compa...

Coupling forces resulting from the type of chain saw used.

INTRODUCTION Woodcutters' working conditions are difficult due to the presence of numerous occupational hazards. Petrol-fuelled chain saws commonly used in forestry produce vibration, which may lead to the development of non-specific disorders in the upper extremities of the chain saw operator, referred to as hand-arm vibration syndrome (HAVS). The magnitude of coupling forces exerted on a vibr...

Cold response of digital arteries in chain saw operators.