Tone produced in a partially filled bottle

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Drinking water from a partially filled bottle increases the length of the air column, which lowers the frequency of the tone produced when air is blown into it. The fundamental frequency decreases, resulting in a different tone rather than the same one. The speed of sound remains constant, but the change in air column length directly affects the frequency. Thus, the new frequency after drinking water will be lower than before. Understanding these principles clarifies the relationship between air column length and sound frequency.
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Homework Statement


A tone will be produced when blowing air to partially filled bottle. What will be the new frequency after drinking some water in the bottle and repeating the same experiment, ?
a. Higher than before
b. Less than before
c. same as before
d. impossible to tell

Homework Equations


f = (2n-1)v / (4L)

The Attempt at a Solution


Drinking some water will make the length of air column increases. For the same tone (assume maybe fundamental frequency) and constant value of v (speed of sound), the frequency will be lower?

Thanks
 
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songoku said:
For the same tone (assume maybe fundamental frequency) and constant value of v (speed of sound), the frequency will be lower?
Yes, but do not refer to that as being the same tone. The tone of an instrument is the sound emitted, consisting of a particular fundamental frequency and the various harmonics. Different fundamental, different tone.
 
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Oh ok. Thank you very much
 

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