Music – Accessories – Tuning devices
Patent
1976-10-07
1979-08-07
Franklin, Lawrence R.
Music
Accessories
Tuning devices
G10G 702
Patent
active
041634080
ABSTRACT:
A tuning device for use in tuning a musical instrument includes sensing means operable for sensing a first electrical signal having a certain frequency bandwidth and corresponding to an acoustical musical note produced by the musical instrument, filtering means coupled to the sensing means and operable for filtering the first signal to produce a second electrical signal having a substantially smaller frequency bandwidth, the second signal being representative of the musical note, dividing means coupled to the filtering means and operable for dividing the frequency of the second signal to produce a third electrical signal, generating means operable for producing a reference electrical signal representative of a musical note for tuning the musical instrument, and comparing means coupled to the dividing means and the generating means and operable for comparing the third signal and the reference signal to each other and for producing a fourth electrical signal when the third signal is within a predetermined frequency range from the reference signal. The filtering means is optional for relatively narrow frequency band instruments, such as a piano.
REFERENCES:
patent: 2901699 (1959-08-01), Motz et al.
patent: 3280937 (1966-10-01), Faber et al.
patent: 3472116 (1969-10-01), Schott
patent: 3766818 (1973-10-01), Prohofsky
patent: 3795169 (1974-03-01), Belcher
patent: 4078469 (1978-03-01), Calvin
Capano David
Capano Philip S.
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