Blowing on bottles

02 March 2008

bottles1m.jpg

Blowing across a bottle to make a note

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when you blew across the bottle what was vibrating, the water, baton, air above the water, or the bottle

the air

wait can u use plastic bottles for that

yes you can use plastic bottles for that

is the frequency more connected to the volume of a vessel compared to Hertz vibration per second. If you half the volume do you increase the pitch by an octave for example .This works for string instrument by halving the length of the string so.... I am interested in natural tuning compared to tempered. The do re me that I hum is detuned about a tone and a bit ,wich fa or f2 vibrates with my heart when I put my hand on my chest .I believe this heart frequency really can heal but is different to the 528 hz promoted on the internet. I have been pronouncing this frequency with the vowel u onto my aching thumb and it has stopped aching through experimenting ive found the vowel u penetrates deep into my muscle and bone with my lips nearly touching or even touching the skin surface . I think the do re me vibrate different parts of your body and vowels help too

what's another similar method to this where you can produce sound/pitch?

how can you change how loud the sound is?

You can blow harder!

Why do you have to be so precise in blowing across the opening of the bottle? Why does the tone become less airy when you get the right angle?

Why is the note produced by striking the bottle different than when you blow across the mouth of it?

Hello Dan.

The reason is that, when you hit the bottle, you are making the glass or plastic resonate (vibrate); the mass and shape of the glass/plastic, and the contents of the bottle, will affect how fast the material can vibrate and how quickly the vibrations die away (damp), both of which affect the pitch of the sounds transmitted back into the air as vibrations you can hear.

When you blow across the top of the bottle you are setting up a wave inside the bottle, the wavelength of which is determined by the height of the space between the bottle neck and the fluid level or bottom of the bottle. The bigger the distance the longer the fundamental wavelength that can "fit" into that space and hence the lower the note. So the sounds (of blowing across the neck versus hitting the sides) arise through two totally different and independent mechanisms and, hence, you would not expect them to be the same.

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