NASA NTRS · 19650000377
Device detects unbonded areas in plastic laminates
Abstract
Device generates an acoustic signal whose frequency changes disclose the presence of delaminated or unbonded areas in plastic laminates. A microphone makes the frequency change audible.
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1965-12-01. Device detects unbonded areas in plastic laminates. https://ntrs.nasa.gov/citations/19650000377
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