Final answer:
A workplace may be too noisy when multiple employees experience hearing problems, particularly if noise levels exceed the recommended limit of 85 dB for 8-hour daily exposures without hearing protection.
Step-by-step explanation:
According to the Canadian Centre for Occupational Health and Safety, a workplace may be considered too noisy when numerous employees have hearing problems. This is likely due to excessive noise levels, which several government agencies and health-related professional associations recommend should not exceed 85 dB during 8-hour daily exposures without hearing protection. Exposure to high noise levels, such as occupational exposure to noisy factory equipment, construction sites, or loud music, can result in sensorineural hearing loss. Employees working under such conditions should use earplugs or ear muffs to protect their hearing, limit exposure time, and stay as far away as possible from the noise source.