Increase in the frequency of sound in a glass of water?

In summary, repeatedly beating a spoon on the bottom layer of a glass of water will cause an increase in the frequency of the sound produced. This increase is relative to the frequency of the previous beat and is caused by the spoon being hit in a consistent manner. However, without proper measurement, this observation cannot lead to any useful answers. Additionally, the change in frequency could also be influenced by the amount of dissolved substances and the fluid level in the glass.
  • #1
SherLOCKed
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Suppose you have a glass of water, and you beat a spoon on the bottom layer of glass through the mouth of glass, repeated beatings in a regular fashion will cause in increased frequency of sound produced due to the spoon beating?What causes such increase in frequency?
 
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  • #2
Increased relative to what? The individual beats should all be very similar.
 
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  • #3
SherLOCKed said:
What causes such increase in frequency?
Did you measure that? How was the hitting controlled to be constant?
 
  • #4
mfb said:
Increased relative to what? The individual beats should all be very similar.
The frequency increased relative to the frequency of previous beat.
 
  • #5
A.T. said:
Did you measure that? How was the hitting controlled to be constant?
This was not done in controlled environment, this is something i have experienced and hence the result has been described qualitatively and not quantized.
 
  • #6
Without some measurement (record it?) I don't see how this thread could lead to useful answers.
 
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  • #7
The OP could be referring to at least two different effects...

In Tea and Coffee the note can sometimes change because stirring causes the amount of Tea, Coffee or sugar dissolved in the water to increase. And possibly reduce the amount of dissolved gasses

Stirring can also cause the fluid level to rise up at the edges so more of the fluid is in contact with the glass.
 
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Related to Increase in the frequency of sound in a glass of water?

1. What causes the increase in frequency of sound in a glass of water?

The increase in frequency of sound in a glass of water is caused by the change in the speed of sound as it travels through different mediums. In this case, the sound travels from air to water, where it travels faster due to the higher density and stiffness of water compared to air. This increase in speed results in a higher frequency of sound waves.

2. How does the size of the glass affect the increase in frequency of sound?

The size of the glass does not directly affect the increase in frequency of sound. However, it can indirectly impact the frequency by altering the amount of water in the glass. A larger glass may have more water, which would result in a higher frequency due to the increased speed of sound in water.

3. Is the increase in frequency of sound the same for all types of glasses?

No, the increase in frequency of sound may vary depending on the material and thickness of the glass. Thicker and denser glasses will result in a larger increase in frequency compared to thinner and less dense glasses.

4. Can other factors, such as temperature, affect the increase in frequency of sound in a glass of water?

Yes, temperature can affect the increase in frequency of sound in a glass of water. As the temperature of the water changes, the speed of sound in water will also change, resulting in a corresponding change in frequency. Warmer water will have a higher speed of sound and therefore a higher frequency, while colder water will have a lower frequency.

5. Is there a limit to how high the frequency of sound can increase in a glass of water?

Yes, there is a limit to the increase in frequency of sound in a glass of water. The maximum frequency will depend on the size, material, and temperature of the glass and water. Once the frequency reaches a certain point, the sound waves will either reflect or refract, resulting in a decrease in frequency. This limit is also known as the resonant frequency of the glass.

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