44 – Sound

44.03  Speed of sound in air versus helium

44.04  Bullwhip (also listed as 40.55 under Traveling waves, under Vibrations and Waves)

44.06  Bell in vacuum

44.09  Sound level meter

44.12  Ear model

44.15  Weighted string sound box

44.18  Sonometer

44.21  Guitar

44.24  Idiophones

44.27  Wind instruments

44.30  Standing sound waves viewed on oscilloscope

44.31  Interference of sound waves, phase

44.33  Speaker over pipes

44.36  Speaker over water-filled tube

44.39  Rubens flame tube

44.42  Beaker breaker

44.45  Chladni plates

44.48  Sound viewed on oscilloscope

44.51  Beats with tuning forks

44.54  Beats with signal generators

44.57  Doppler effect, electronic speaker

44.60  Doppler effect, air instrument

44.63  Videos of Doppler effect and shock waves

A video of this demonstration is available (a link is on its page).