A6 Physics of sound

22 Feasible experiments

• Introduction
• When we hear a sound
• Oscillatory motion
• Period and frequency of oscillating motion
• Time dependence of oscillatory motion law
• Oscillatory motion energy
• Features of sounds
• Why we hear sounds
• Acoustic waves
• Equation of a sine wave
• How acoustic waves are transformed into sounds
• The limits of audibility
• The sensitivity of the auditory system
• Reflection of acoustic waves
• Interference of acoustic waves
• Beats
• Stationary waves
• Resonance
• Stringed musical instruments
• Musical instruments working with air
• Sounds timbre