[Physiological-occupational assessment of acoustic load with equal energy but different time and informational characteristics].

The article deals with results of experimental study comparing effects of 4 types of acoustic load--noise (constant and impulse) and music (electronic symphonic one and rap)--on hearing sensitivity, processes in nervous system and subjective evaluation. All types of acoustic load were equal in energy (on evaluation according to equivalent level during the experiment). The study included 2 levels of load--90 and 95 dB.

[The potentials of the ShVIL-01 device for the integral assessment of variable noise and local vibration].

The article is addressed to a broad range of experts and provides information on the design and serial production of a new device for automated measurements of energy-equivalent variable noise levels in combination with the phonometers produced both in the USSR and abroad. The technical characteristics of the device and description of its use are given, along with the tables of equivalent levels into the share dosage conversion and the conversion of the exposition levels into the share dosage for respective standards and hygienic norms-based values.

[Hygienic assessment of the overall noise load in civilian aviation crews].

The contributors give a hygienic assessment of the overall noise load in Soviet Civil Aviation crews' labour conditions and propose an original technique for noise load measurements during the flight, including noise level measurements in the cabin, effectiveness of individual noise protection means, and measurements of noise resulting from individual radio communication devices. The communication devices are considered to bear major responsibility for noise load in modern aircraft crews. Conclusions are made with regard to the health related factors of noise load in off-flight state (when in the landing field) and off-duty conditions (at rest in airport hotels and recreation sites).