Calculate acoustic resonance
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Posted by Harry Lang on April 15, 2006, 4:03 am
Please log in for more thread options Can anyone provide a simple formula whereby I can calculate the acoustic resonance of a physical object if its length is given in mm? Thank you, Harry Lang | ||||||||||||||||||||||||||||||||||||||||
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Posted by Winfield Hill on April 15, 2006, 7:06 am
Please log in for more thread options Harry Lang wrote... Yes, lookup the velocity of sound in the object's material. You can calculate the resonant frequency from the velocity divided by the object's size. If sound can find different path lengths through your object, to reflecting surfaces, it can form multiple resonant modes. Sound reflections occur wherever there's an acoustic impedance change. -- Thanks, - Win | ||||||||||||||||||||||||||||||||||||||||
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Posted by John Fields on April 15, 2006, 10:12 am
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On Sat, 15 Apr 2006 17:33:09 +0930, Harry Lang >Can anyone provide a simple formula whereby I can calculate the
>acoustic resonance of a physical object if its length is given in mm? --- No. -- John Fields Professional Circuit Designer | ||||||||||||||||||||||||||||||||||||||||
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Posted by John Fields on April 15, 2006, 11:46 am
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On Sat, 15 Apr 2006 09:12:10 -0500, John Fields >On Sat, 15 Apr 2006 17:33:09 +0930, Harry Lang
> >>Can anyone provide a simple formula whereby I can calculate the
>>acoustic resonance of a physical object if its length is given in mm? >
>--- >No. --- Oops... Yes. V f = --------- 2 (lE3) Where f is the resonant frequency of the object in the length direction, in Hertz, V is the velocity of sound in the medium the object is made from, in meters per second, and l is the length of the object in millimeters. -- John Fields Professional Circuit Designer | ||||||||||||||||||||||||||||||||||||||||
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Posted by John Fields on April 15, 2006, 11:58 am
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On Sat, 15 Apr 2006 10:46:33 -0500, John Fields >On Sat, 15 Apr 2006 09:12:10 -0500, John Fields
> >>On Sat, 15 Apr 2006 17:33:09 +0930, Harry Lang
>> >>>Can anyone provide a simple formula whereby I can calculate the
>>>acoustic resonance of a physical object if its length is given in mm? >>
>>--- >>No. >
>--- >Oops... Yes. > > > V > f = --------- > 2 (lE3) > >Where f is the resonant frequency of the object in the length >direction, in Hertz, V is the velocity of sound in the medium the >object is made from, in meters per second, and l is the length of >the object in millimeters. --- Oops again... V f = ---------- 2 (lE-3) -- John Fields Professional Circuit Designer | ||||||||||||||||||||||||||||||||||||||||
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> Can anyone provide a simple formula whereby I can calculate
> the acoustic resonance of a physical object if its length
> is given in mm?