Bell with subharmonic difference tone
US10424278B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 2, 2017 |
| Grant date | Sep 24, 2019 |
| Priority date | — |
| Expiry date | Sep 7, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K1/10
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A bell and method of tuning a bell with its lowest frequency partials at f1=f and f2=3f=2. The simultaneous presence of physical tones at these partial frequencies yields a difference tone, perceived by the listener, at f2f1=3f=2f=f=2. The difference tone is subharmonic, in that its perceived frequency (f=2) is below the frequency of the fundamental (f). Preferably, the bell has one or more additional partials at frequencies fn=(n+1)f=2, with n 2 f3; 4; 5: : : g, strengthening the listener's perception of the difference tone at f=2. The bell thus yields a strike tone at f=2 but has a characteristic dimension (e.g. height or diameter) equal to that of conventional bells with a strike tone at f, providing art eightfold savings in bell mass.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.