# TB 26-09 Measured Hammer-Tap Inputs

- Source: NASA
- Published: 2026-11-02T20:47:41+00:00
- Category: Science
- Original: https://www.nasa.gov/centers-and-facilities/nesc/tb-26-09-measured-hammer-tap-inputs/
- Canonical: https://groundlevelnews.com/story/tb-26-09-measured-hammer-tap-inputs-989971/

For more information, contact Joel W. Sills, Langley Research Center, joel.w.sills@nasa.gov. Download the PDF version An instrumented hammer test does not require an idealized single half-sine waveform. When the complete force and response are measured accurately, crest ripples and separated contacts remain known inputs. Force shape changes excitation, but does not inherently invalidate the record

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