FIELD: physics.
SUBSTANCE: sound velocity in bell material is measured. Bell is placed in gasostatic extruder and reduced at 1000-2000 atm. Sound velocity is measured again to determine bell age proceeding from the following relationship: 
where: T is age in years, Cs1 is sound velocity in bell material before placing in gasostatic extruder, m/s; Cs2 is sound velocity in bell material after placing in gasostatic extruder, m/s.
EFFECT: higher accuracy.
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD TO DETERMINE BELL AGE | 2009 |
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