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A resonator is a device that produces resonance. They are used to generate waves of specific frequencies. Say for example the musical instruments, cavity resonator (electromagnetic), cavity magnetron, the klystron. There is what we call mechanical resonators used in electronic circuits.
TE111 and TM011
When frequency of a vibrating body matches with natural frequency of other body,resonance takes place that is why army troops are asked to break their steps while crossing the bridge and glass of window pane get broken when a body like aeroplane passes near to it actually what happens the natural frequency of aeroplane matches with glass panes..
The tuned frequency of a rhomboidal shaped Helmholtz resonator can be calculated using the Helmholtz resonator formula, which takes into account the volume of the resonator cavity, the area of the neck opening, and the length of the neck. The formula is f = (c/2π) * sqrt(AVL), where f is the resonant frequency, c is the speed of sound, A is the area of the neck opening, V is the volume of the cavity, and L is the length of the neck.
Resonance can occur when an object vibrates at another objects resonant frequency.
Resonance occurs in the outer ear and is a function of the length of the auditory canal, wherein some frequencies are enhanced by combinatorial properties of other incoming frequencies - the frequency reinforced the most is termed the 'resonant frequency' of the canal.
The two types of human voice resonance are oral resonance, which occurs in the oral cavity and involves the mouth and throat, and nasal resonance, which involves the nasal passages. These types of resonance affect the quality and timbre of the voice.
Resonance can occur in any solid material where the frequency of oscillation in the material is equal to the natural frequency of the material.
it will occur just before the resonance.
Eric J. Vanzura has written: 'The NIST 60-millimeter diameter cylindrical cavity resonator' -- subject(s): Evaluation, Equipment and supplies, Cavity resonators, Dielectric measurements
diffusion of air through air sacs
In acousitcs, a device used to increase resonance(like echo effects) of a soud and usually apparent volume there are both acoustic(on some guitars such as the Resophonic) and electronic resonators. Of course if you recorxed in a bent conrete tunnel like those culverts in central park this would be a natural resonator llike the higher noise of a train in a tunnel, the sound reverberating off the walls. Phil Spector made good use of resonance and(wall of Sound) in his recordings many of which could not be performed live for optimum effect. crimson and clover has resonator effects. On an automobile it is a devise , like a muffler, used to lower the sound output.