Smallest detectable flaw size, especially for low frequency test (f= 0.5 MHz) and in general.

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Smallest detectable flaw size, especially for low frequency test (f= 0.5 MHz) and in general.
Posted by: R.Died , E-mail: rd@ultrasonic.de, on September 06, 1996 at 23:31:52:
For an applied frequency of 0.5 MHz what will be the smallest flaw
that air coupled ultrasound could find?
Furthermore I want to enter into a general discussion about smallest detectable flaw sizes.
Is there a certain relation between flaw size and frequency?
- lambda/flaw dia ratio?
- Is this relation linear?

Preconditions: ideal reflection (shape and impedance).

Rolf Diederichs

Follow Ups:

Re: Smallest detectable flaw size, especially for low frequency test (f= 0.5 MHz) and in general. Bill Grandia 00:32:42 9/08/96 (size: 824) (6)

Re: Smallest detectable flaw size, especially for low frequency test (f= 0.5 MHz) and in general. Robert A. Day 23:37:40 9/11/96 (size: 4645) (5)

Re: Smallest detectable flaw size, especially for low frequency test (f= 0.5 MHz) and in general. Bill Grandia 23:47:01 9/14/96 (size: 9685) (0)

Re: Smallest detectable flaw size, especially for low frequency test (f= 0.5 MHz) and in general. Rolf D. 10:24:22 9/12/96 (size: 1138) (2)

Re: Smallest detectable flaw size, especially for low frequency test (f= 0.5 MHz) and in general. Yosi Bar-Cohen 09:40:40 9/19/96 (size: 1880) (0)

Re: Smallest detectable flaw size, especially for low frequency test (f= 0.5 MHz) and in general. Bill Grandia 00:01:18 9/15/96 (size: 10660) (0)

Re: Smallest detectable flaw size, especially for low frequency test (f= 0.5 MHz) and in general. W. Grandia 02:17:45 9/12/96 (size: 5424) (0)

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Comments:
: For an applied frequency of 0.5 MHz what will be the smallest flaw : that air coupled ultrasound could find? : Furthermore I want to enter into a general discussion about smallest detectable flaw sizes. : Is there a certain relation between flaw size and frequency? : - lambda/flaw dia ratio? : - Is this relation linear? : : Preconditions: ideal reflection (shape and impedance). : : Rolf Diederichs

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