Final answer:
The claim that exposure to noise levels at or below 75 dB can cause hearing loss is false. The threshold for potential hearing damage is generally 85 dB with prolonged exposure. Protective measures should be taken when noise levels exceed 85 dB to prevent hearing loss.
Step-by-step explanation:
The statement indicating that exposure to noise levels over a long period of time at or below 75 dB can cause hearing loss is false. Several government agencies and health-related professional associations have designated 85 decibels (dB) as the level not to be exceeded during an 8-hour daily exposure without hearing protection. Noise levels at or below 75 dB, typical of a classroom lecture or heavy urban traffic, are not known to cause hearing damage even with prolonged exposure. However, continuous or repeated exposure to noise levels above 85 dB, such as a noisy factory or loud rock concert, can lead to hearing loss over time. To prevent hearing loss, it is recommended to wear ear protection, limit exposure time, and maintain a distance from the noise source.