Helicopters generate substantial noise levels, especially at low frequency. These noise levels are normally not harmful for rpm Rotation per minute the ear. However, the low frequency content masks the speech . Therefore, pilots tend to set the communication system at maximum level so that the sound levels reach severe amplitudes for the ear. These high sound levels are exposing the ear to fati...

Impulse noise generated by industrial machines and occurring at a workplace is a cause of substantial hearing loss in workers. The paper presents data on workplace impulse noise, recorded in three plants of the machine industry. The data were collected in drop-forge, punch-press and machinery shops. The results of the measurements are shown as cumulative relative frequency distributions of the ...

Looking for new possibilities to describe the information embedded in speech, we have carried out sentiment correlation analysis between speech features and color attributes. Using single vowel utterances with different prosody and sound pressure level, we have asked subjects to select colors based on their perceptual impressions after listening them. By analyzing selected color attributes usin...

We read with interest the recent issue of Critical Care in which Darbyshire and Young [1] reported on noise levels in five different ICUs and demonstrated average sound pressure levels far above the World Health Organization recommended standard of 35 dB LAeq (A-weighted energy-equivalent sound pressure level in decibels). Although their article provides an interesting insight into the ICU soun...

Measurements were made of the flow field structure and the near field parameters of a jet exhausting from a sonic nozzle with a 1.27 cm exit diameter. Compressed air was used for obtaining stagnation pressures up to ~ 5 atmospheres. The jet exhausted vertically from a settling chamber into an acoustically insulated room and through an insulated duct out through the roof. Measurements were made ...

This study was designed to determine the effect of stimulated vocal loudness on nasalance in individuals with various dysarthria subtypes. Thirty participants produced three stimulated levels of vocal loudness while reading a nonnasal passage. Data included dysarthria classification, vocal sound pressure level, nasalance, and listener perception of nasality. There was not a predictable relation...