Associate Safety Professional Practice Exam

What does TTS refer to in hearing?

1. A permanent threshold shift

2. A temporary threshold shift

3. A maximum sound exposure limit

4. A standardized hearing test

The correct answer is: A temporary threshold shift

TTS stands for temporary threshold shift in hearing. This term refers to a temporary change in hearing sensitivity, often caused by exposure to loud noise. When an individual is subjected to high sound levels, they may experience a short-term reduction in their ability to hear soft sounds or certain frequencies. This is not a permanent condition, and typically, hearing sensitivity returns to normal after a period of recovery, which could range from a few minutes to several hours depending on the intensity and duration of noise exposure. Understanding TTS is crucial in occupational health and safety, particularly in environments with noise exposure, as it highlights the importance of hearing conservation programs and regular hearing assessments. It serves as an indicator that individuals may need to protect their hearing more vigilantly in such environments, even if significant permanent damage has not yet occurred. The other options do not accurately reflect the meaning of TTS. A permanent threshold shift implies lasting damage, which is different from the temporary nature of TTS. A maximum sound exposure limit is a regulatory guideline for permissible noise levels to prevent hearing loss but does not define TTS. A standardized hearing test is a method for assessing hearing ability but is unrelated to the specific term TTS.