Sound

action aerial agitated atmosphere audible augmented beats bell burner carbonic acid cause centre column of air condensation Consonance and Dissonance corresponding density direction disk dissonance distance divides echoes effect elasticity experiments fog-signal fork fundamental tone glass harmonic hear heard heat Helmholtz horns inches instrument intensity interval John Herschel layers length light liquid membrane ment miles minor third Montlhéry motion musical intervals musical sound nodal lines nodes number of vibrations observed obtained octave organ-pipe orifice overtones particles pass pendulum pipe pitch placed produced prongs puffs pulses rapidity rarefaction rates of vibration ratio reed reflected rendered resonance resultant tone rotation Schaffgotsch screen sensitive flame siren sonorous wave sound-waves South Foreland square stretched striking string surface temperature tion Trinity House tube tuning-fork tympanic membrane unison vein velocity of sound ventral segments vibrating segments Villejuif whistle wind wire