Induced vibrations and resonances

In summary, in class the topic of sound is being studied and specifically, resonance. Resonance is when an object vibrates at its natural frequency due to contact with air molecules or a sound board. It is unclear from the article whether objects vibrating at their natural frequency will induce vibration in all other objects or only those with the same natural frequency. After clarification, it is understood that resonance will induce vibration in all objects, but those with similar natural resonance will experience a greater increase in vibration.
  • #1
danago
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Hey.
In class at the moment we are studying sound.

Ive just read about resonance. Now, from what i understand, resonance is the induced vibration in an object from another object which is vibrating at its natural frequency, via contact with air molecules, a sound board etc.

Now, the article is slightly unclear about one thing, which is what I am asking. If i have an object vibrating at its natural frequency, will it induce vibration of the same frequency in ALL other objects, or only those objects which have the same natural frequency? And if so, why is this?

Thanks in advance,
Dan.
 
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  • #2
Resonance is the sudden increase in _amplitude_ of oscillation at a certain frequency.
 
  • #3
Thus, yes it will induce vibrations in all objects, but the ones who have a similar natural resonance will enjoy an increase in vibration.
 
  • #4
Oh ok. That clears it up for me then :smile:

Thanks.
Dan.
 

1. What are induced vibrations?

Induced vibrations refer to the oscillations or movements that are caused by an external force or stimulus. These vibrations can occur in various systems, such as mechanical, electrical, or biological, and can have different causes, such as wind, sound, or electromagnetic waves.

2. What is resonance?

Resonance is a phenomenon that occurs when an object or system vibrates at its natural frequency in response to an external force or stimulus. This results in a larger amplitude of oscillation and can lead to destructive or constructive interference.

3. How do induced vibrations and resonances affect structures?

Induced vibrations and resonances can cause significant damage to structures if they are not properly accounted for. These vibrations can lead to fatigue and stress on the materials, resulting in cracks, fractures, or even collapse. Engineers must consider these factors when designing structures to ensure their stability and longevity.

4. What are some examples of induced vibrations and resonances?

Some common examples of induced vibrations and resonances include the vibrations caused by wind on a suspension bridge, the vibrations of strings on a musical instrument, and the resonant frequency of a wine glass when a finger is run along its edge. These phenomena can also be observed in biological systems, such as the resonance of vocal cords in speech.

5. How can induced vibrations and resonances be controlled?

There are various ways to control induced vibrations and resonances, depending on the specific system and its properties. Some methods include adjusting the material properties, changing the geometry or shape of the structure, or using dampening materials or devices. Additionally, proper maintenance and monitoring can help prevent and mitigate the effects of induced vibrations and resonances.

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