Occupational noise induced hearing loss (NIHL) has been a major concern since the beginning of the industrial revolution. Several hundred years later, noise and hearing loss are still are major concerns for the construction work force, management and safety professionals. Depending on the trade, one study of more than 1300 noise measurements indicated approximately 70% of the construction worke...

We measured 24-hour ambulatory blood pressure and 16-hour noise exposure continuously for 20 automobile workers, and used linear mixed-effects regression models to estimate transient and sustained effects of noise exposure on blood pressure. The occupational noise levels of the high-exposure workers with 85 +/- 8 dBA were significantly higher than those of the low-exposure workers with 59 +/- 4...

The differential susceptibility of inbred mouse strains DBA/2J (susceptible) and C57BL/6J (resistant) to pulmonary tuberculosis following aerosol infection is under complex genetic control. In this report, transcriptional profiling with RNAs from Mycobacterium tuberculosis-infected lungs was used to investigate the physiological response, cell type, and biochemical pathways underlying different...

Thirty-two points in Kuala Lumpur were selected where traffic personnel were on duty. Sound level readings were taken three times a day. Generally, the traffic noise levels were between 75 dBA to 85 dBA. The maximum sound level recorded was 108.2 dBA. Noise emitted by traffic equipment and vehicles were up to 133 dBA. Results of audiometric tests revealed that out of 30 who were tested, 24 or 8...

Adult Ascaris suum body extract (Asc) prepared from male and female worms (with stored eggs) down-regulates the specific immune response of DBA/2 mice to ovalbumin (OA) and preferentially stimulates a Th2 response to its own components, which is responsible for the suppression of the OA-specific Th1 response. Here, we investigated the participation of soluble extracts prepared from male or fema...

Deoxyglucose uptake in peripheral auditory tissues and inferior colliculus of the young CBA or C57BL/6J mouse increases with intensity of an acoustic stimulus from 25 to 85 dBA and decreases from 85 to 115 dBA. In 36-month-old CBA and 9-month-old C57BL with sensorineural hearing loss the metabolic response to stimulation is attenuated 50% or more. Metabolic responses to stimuli are qualitativel...

Multiple noise measurements were taken on 6 types of fire station equipment and 15 types of emergency response vehicle-related equipment used by firefighters during routine and emergency operations at 10 fire stations. Five of the six types of fire station equipment, when measured at a distance of one meter and ear level, emitted noise equal to or greater than 85 dBA, including lawn maintenance...

OBJECTIVE The usage of personal listening devices (PLDs) is associated with risks of hearing loss. The aim of this study is to evaluate the effects of music exposure from these devices on high-frequency hearing thresholds of PLD users. MATERIALS AND METHODS A total of 282 young adults were questioned regarding their listening habits and symptoms associated with PLD listening. Their audiogram ...