At what sound level in decibels (dB) can hearing damage become permanent?

Hearing damage can begin to occur at sound levels as low as 85 dB, but permanent damage is more likely at higher levels. At 140 dB, sound is extremely loud and can cause immediate harm to the sensitive structures within the ear. Prolonged or repeated exposure to sounds at this intensity can lead to irreversible hearing loss, as the sound waves can damage the hair cells in the cochlea which are essential for hearing. This level is recognized as a critical threshold beyond which caution is required to avoid lasting auditory harm. It is important to protect one's hearing in environments where such loud sounds are experienced, such as concerts or industrial settings.