MHR 711 Study Guide - Midterm Guide: Sensorineural Hearing Loss, Sound Pressure, Active Noise Control

• School: Ryerson University
• Department: Human Resources
• Course: MHR 711
• Professor: Theresa Miedema

Document Summary

Physical agents: sources of energy that may cause injury or disease (ex: noise, vibration, temperature, radiation, heat) Ambient: all-encompassing condition associated with a given environment, being usually a composite of inputs from sources all around us (ex: condition surrounding entire environment heat, light) Early warning change: a deterioration of hearing in the upper frequency the earliest detectable sign of noise induced hearing loss (ex: test of hearing loss) Hyperreflexia: noise damage of unusually quick reaction by the nerves to some external stimulus. Vasoconstriction: type of noise damage that causes constriction of blood vessels. Can cause physiological damage that affects hearing and psychological effects. Physiological damage conductive hearing loss (restricts transmission of sound to cochlea or inner ear) and sensorineural hearing loss (nerve deafness) affects the cochlea, irreversible. Audiometer: instrument used to determine sensitivity of a person"s hearing or degree of hearing loss. Dosimeter: measures a person"s exposure to noise as a percentage for one shif.