| Autor: |
E. R. Smith, Seymour Edelman, Earle Jones |
| Rok vydání: |
1961 |
| Předmět: |
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| Zdroj: |
The Journal of the Acoustical Society of America. 33:848-848 |
| ISSN: |
0001-4966 |
| DOI: |
10.1121/1.1936870 |
| Popis: |
Review of recent publications indicates that current primary laboratory‐calibration methods provide sufficient accuracy for present and foreseeable future needs. An upper frequency limit for vibration measurement was first indicated by Schloss. For usual levels, this sets a lower bound to the amplitudes needed in calibration. The use of resonant systems provides means for reaching large amplitudes as they are needed. Serious errors in calibration result from transverse shake table motion. Methods for monitoring motion exist, allowing elimination of this source of error. Shakers free of transverse motion are needed urgently. Development of means for accurate measurement of the transverse sensitivity of pickups at all frequencies of interest is needed also. Full exploitation of primary calibration techniques requires suitable comparison shakers and transfer standards. Available instruments are described. The need for an adequate transfer standard pickup and the characteristics of such an instrument are disc... |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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