Respuesta :

Sound waves come from mechanical vibrations in solids, liquids, and gases. ... When a sound or light wave strikes an object, it is already vibrating at some particular frequency. If that frequency happens to match the resonant frequency of the object it's hitting, then you'll get what's called resonance.

Answer:

When the frequency being produced by the horn matches the natural frequency of the horn then resonance occurs.

Explanation:

Every object has its own frequency called natural frequency. When the sound being produced by an instrument matches the natural frequency of the instrument then acoustic resonance is achieved. Wine glasses breaking by the application of sound is an example of this phenomenon.

So, when the frequency being produced by the horn matches the natural frequency of the horn then resonance occurs.

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