the tropical zone
frequency-dependent conductance
an apparatus that changes the wave length of a radio signal
having frequencies above those of audible sound
of radio waves, the act of eliminating the frequencies above a certain range
a varied mixture of sound waves that covers every frequency range
the act of eliminating frequency waves lower than those of a specified band area
having frequencies below those of audible sound
any of a series of musical tones whose frequencies are integral multiples of the frequency of a fundamental
The mean value of the frequency decreases with increasing amplitude.
A tuning fork produces a pure tone of a specific frequency.