GENERAL KNOWLEDGE

Detailed explanation-1: -the absolute threshold hearing is the minimum sound level that can be heard. It is a subjective value which may differ individually. its unit is decibels db.

Detailed explanation-2: -The hearing threshold is the sound level below which a person’s ear is unable to detect any sound. For adults, 0 dB is the reference level. A threshold shift is an increase in the hearing threshold for a particular sound frequency.

Detailed explanation-3: -The threshold of ‘feeling’ is the sound pressure level at which people feel discomfort 50 per cent of the time. Approximately 118 dB SPL at 1 KHz. The threshold of ‘pain’ is the sound pressure level at which people feel actual pain 50 per cent of the time.