How high levels of ultrasound can be created in Air?

AI Thread Summary
High levels of ultrasound can be generated in air using a tone generator, amplifier, and ultrasonic speaker, but caution is advised due to potential dangers. Theoretical discussions suggest that while sound levels in air can reach around 194 dB, the same may not apply to ultrasound due to significant attenuation at high frequencies. Concerns were raised about the health risks associated with high ultrasound levels, including non-auditory discomfort. The conversation highlighted the need for professional oversight when experimenting with ultrasound, as it can be harmful. Overall, understanding the creation and implications of high ultrasound levels in air is crucial for safety and effective application.
Piotr99
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Please can someone explain me how high levels of ultrasound can be created in Air?
Should we consider the Ultrasound or we should concentrate only on sound level in Air as frequency ultrasound have no effect on sound level?
 
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Piotr99 said:
Please can someone explain me how high levels of ultrasound can be created in Air?
Should we consider the Ultrasound or we should concentrate only on sound level in Air as frequency ultrasound have no effect on sound level?
Welcome to the PF.

What is the context of your question? What are you trying to do?
 
Hi Mentor,

Thank you for reply. This is a question which is going on top of my head as I am approaching Acoustics and Ultrasound subject.
 
Piotr99 said:
Hi Mentor,

Thank you for reply. This is a question which is going on top of my head as I am approaching Acoustics and Ultrasound subject.
You do understand that high levels of ultrasound in air can be dangerous, right? Can you say why that is true?
 
Of course, I think the limits are 120 dB for Ultrasound based on WHO but I saw some standards stating lower limits. Why is dangerous because causing all kinds of non-auditory discomforts and probably more stuff..
But my theoretical questions is how high levels of ultrasound can be created in Air? I know based on Sound Level in Air that the highest level is around 194 dB. But can we say it will be 194 dB for ultrasound as well? Have high frequency affect the sound level due to strong attenuation of Ultrasound in air?
 
Piotr99 said:
...
But my theoretical questions is how high levels of ultrasound can be created in Air?
With a tone generator, an amplifier, and an ultrasonic capable speaker?
Being somewhat old, everything above 12,000 hz is ultrasonic, so my laptop, add on speakers, and on-line tone generator were able to create "ultrasound".
I know based on Sound Level in Air that the highest level is around 194 dB. But can we say it will be 194 dB for ultrasound as well?
wiki claims that that is a "dubious" claim. [ref] Do you have a reference for that? I searched for about 20 minutes and couldn't find a source for the claim.
Have high frequency affect the sound level due to strong attenuation of Ultrasound in air?
I don't know. Have you googled it?
 
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berkeman said:
You do understand that high levels of ultrasound in air can be dangerous, right? Can you say why that is true?
Well, I don't know about Piotr, but I now understand.

Note to home experimenters: This is a horrible experiment to try on yourself. My ears are still ringing!
 
berkeman said:
You do understand that high levels of ultrasound in air can be dangerous, right? Can you say why that is true?
It can be dangerous, both for people and for things， be careful， if you're not a professional or a scientist
 

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