CHILD DEVELOPMENT PEDAGOGY

Detailed explanation-1: -Sound is measured in decibels (dB). A whisper is about 30 dB, normal conversation is about 60 dB, and a motorcycle engine running is about 95 dB. Noise above 70 dB over a prolonged period of time may start to damage your hearing. Loud noise above 120 dB can cause immediate harm to your ears.

Detailed explanation-2: -We measure sound intensity (also referred to as sound power or sound pressure) in units called decibels. Decibels (dB) are named in honor of Alexander Graham Bell, the inventor of both the telephone and the audiometer. An audiometer is a device that measures how well a person can hear certain sounds.

Detailed explanation-3: -Normal hearing range is from 0 dBHL (Decibel Hearing Level), which is the audiometric zero, to 20 dBHL. Any threshold, at any frequency, that is over 20 dBHL is identified as hearing loss. Though a ‘normal’ audible range for loudness is 0 – 180dB, anything over 85dB is considered damaging for our hearing.

Detailed explanation-4: -The decibel (dB) is a unit that expresses the ratio of two values of a physical quantity, often power or intensity. One decibel is one-tenth of one bel, a unit named in honour of Alexander Graham Bell.

Detailed explanation-5: -Loudness of sound is measured in decibels (dB). This is actually a measure of intensity, which relates to how much energy the pressure wave has. Decibels are a relative measurement. They relate the intensity of a pressure wave to a normal or standard pressure.