What is the threshold of audibility in decibels?

The threshold of audibility is defined as the quietest sound that the average human ear can detect. This level is standardized at 0 decibels (dB), which represents the softest sound that most people with normal hearing can perceive. It serves as a baseline in audiology for measuring hearing sensitivity; sounds measured above this level are audible and can be heard by individuals with normal hearing acuity.

Zero decibels does not imply the absence of sound but rather indicates a reference point on the decibel scale, where sound pressure is just sufficient for perception. This context highlights the significance of understanding hearing thresholds and helps audiologists and health technicians in evaluating and diagnosing hearing abilities in individuals.