Damage to the external ear can cause conductive hearing loss.

What are the two common types of gases used for calibration of DRI’s? 

What is a practical way of measuring the noise exposure of workers who perform a variety of tasks at different locations?

Toxicity is the probability that a chemical will cause harm. 

Environmental factors or stresses can be classified as ___________? (select all that apply)

Cyclones are used to

The measurement of hearing is done using __________ (an instrument) that can generate a frequency-controlled audio signal (pure tone).

Which federal agency is responsible for occupational health and safety research?

What is the answer to the following equation (two noise sources): 84 dB + 84 dB = _____

If hearing loss is due to damage to the inner ear and/or the auditory nerve, the hearing loss is classified as _____.