Implications of human performance and perception under tonal noise conditions on indoor noise criteria

Implications of human performance and perception under tonal noise conditions on indoor noise criteria.

This research investigated differences in task performance and perception under six non-time-varying ventilation-type background noise spectra with differing tonality. The results were related to five indoor noise criteria systems: noise criteria, balanced noise criteria, room criteria, room criteria mark II, and the A-weighted equivalent sound pressure level (L(Aeq)). These criteria systems ar...

Effects of Short Noise Bursts on Human Performance and Perception

Numerical study on the acoustic field of a centrifugal fan and the tonal noise sources

The widespread use of squirrel cage fans, especially in ventilation and home and industrial environments, has led to the formation of many research efforts to improve performance and reduce the sound produced by this type of fan. In the literature, the most important factor in generating sound in this category of fans is the confrontation between the rotor exit flow and the volute of the fan. I...

The Effect of Age and Type of Noise on Speech Perception under Conditions of Changing Context and Noise Levels.

OBJECTIVE Everyday life includes fluctuating noise levels, resulting in continuously changing speech intelligibility. The study aims were: (1) to quantify the amount of decrease in age-related speech perception, as a result of increasing noise level, and (2) to test the effect of age on context usage at the word level (smaller amount of contextual cues). PATIENTS AND METHODS A total of 24 you...

Acoustic Source Perception of Human Under Noise: A Comparative Assesment

Acoustic Source Perception is capability of human to classify incoming sensory information from the surroundings. Introduction of noise affects the Acoustic Source Perception (ASP) and also decrease the concentration of human subject for a particular task. Thus, an effort has been made to evaluate impact of introduction of noise on ASP by human subjects. A device has been developed using variou...