Title:
TONE GENERATION
Document Type and Number:
WIPO Patent Application WO/2015/112608
Kind Code:
A3
Abstract:
A tone generation system includes a square wave signal generator configured to generate a first series of square wave signals to replicate a fundamental frequency of a desired mechanical tone, and a second series of square waves signals to replicate a second harmonic of the desired mechanical tone. An amplifier is configured to receive the first and second series of square waves, and a speaker is connected to receive an output signal from the amplifier.
Inventors:
CASSIDY SCOTT (US)
MORAVETZ LONNIE (US)
COREY DAVID L (US)
STEIERT ROBERT (US)
MORAVETZ LONNIE (US)
COREY DAVID L (US)
STEIERT ROBERT (US)
Application Number:
PCT/US2015/012259
Publication Date:
October 22, 2015
Filing Date:
January 21, 2015
Export Citation:
Assignee:
FED SIGNAL CORP (US)
International Classes:
G10K15/02
Foreign References:
| US3809791A | 1974-05-07 | |||
| US20090153221A1 | 2009-06-18 | |||
| US4724424A | 1988-02-09 | |||
| EP0025537A1 | 1981-03-25 | |||
| FR2333314A1 | 1977-06-24 | |||
| EP1014336A2 | 2000-06-28 |
Attorney, Agent or Firm:
BRUESS, Steven, C. (P.O. Box 2903Minneapolis, MN, US)
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