[The effect of different masking noises on psychophysiological tasks]

Area of Science:

• Psychophysiology
• Human Factors Engineering
• Cognitive Psychology

Background:

• Noise exposure is a common environmental stressor.
• Understanding noise's impact on cognitive tasks is crucial for occupational safety and performance.
• Previous research has explored noise effects, but a comprehensive analysis of different noise types and their psychophysiological correlates in problem-solving is needed.

Purpose of the Study:

• To investigate the influence of wide-range (white), pulsed, and interrupted noise on psychophysiological characteristics during problem-solving tasks.
• To identify which physiological parameters are most sensitive to noise interference in cognitive processes.
• To assess the differential impact of noise intensities (60 and 90 dB(A)) on operator activities.

Main Methods:

• Experimental design involving exposure to various noise conditions (white, pulsed, interrupted) at different intensities.
• Recording of physiological indicators: pulse rate and variance, breathing rate and variance, and vascular tone.
• Utilizing psychologic tests simulating operator activities, including mathematical computations, information processing, and a compound option problem.

Main Results:

• Noise exerts a masking effect, more pronounced in psychophysiological problems related to operative memory.
• Significant changes in physiological parameters were observed under noise exposure.
• Increased peripheral vascular tone was the most informative physiological indicator of noise's impact.

Conclusions:

• Noise, particularly at higher intensities and with specific characteristics, impairs cognitive functions like operative memory.
• Physiological responses, especially changes in vascular tone, serve as key indicators of noise-induced stress during complex tasks.
• Findings highlight the importance of noise control in environments requiring high operator performance and cognitive function.