B17 Ear and hearing

16 Feasible experiments.

• Oscillatory motion
• Graphic representation of oscillatory motion
• When we hear a sound
• Why we hear sounds
• Acoustic waves
• How acoustic waves are transformed into sounds
• Ear: a receiver of acoustic waves
• The ear – brain system
• Audibility limits
• Distinctive characters of the sounds
• Sensitivity of the auditory system
• How to reinforce auditory sensitivity
• Stereophony
• Echo and reverberation
• How to take care of the hearing system