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Testing of poles by using acoustic pulse method

✍ Scribed by J. I. Dunlop

Publisher
Springer
Year
1981
Tongue
English
Weight
571 KB
Volume
15
Category
Article
ISSN
0043-7719

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✦ Synopsis

Wood poles have been traditionally tested by "sounding" -striking with a hammer and making a subjective assessment on the basis of the sound emitted. Various other acoustic methods have been developed and employed for this function but none has been accepted on any regular basis as being successful. The propagation of acoustic waves in poles is examined here, and measurements are made using a pulse echo technique of the two acoustic parameters, velocity and damping, on a selection of poles some of which contain decay and rot. The results suggest that measurement of the acoustic damping of longitudinal compression waves may be useful in detecting the presence of decay and rot within a pole.

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Testing of poles by acoustic resonance
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✍ J. I. Dunlop πŸ“‚ Article πŸ“… 1983 πŸ› Springer 🌐 English βš– 383 KB

An acoustic resonance technique has been evaluated as a means of detecting deterioration in wood poles. The basis of the technique is that degradation of the pole by rot or other agency will lead to an increase in the damping of longitudinal acoustic waves, which can subsequently be detected by an e