NOISE CANCELLER DEVICE OF MAGNETIC RECORDING AND REPRODUCING DEVICE

PURPOSE:To decrease noises by converting periodic noises to an electric signal and outputting the signal obtd. by inverting the phase of this electric signal and amplifying the signal as a sound. CONSTITUTION:A microphone 21 converts the periodic noises generated by the attachment and detachment of...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
1. Verfasser:	YABU SHIGEHIRO
Format:	Patent
Sprache:	eng
Schlagworte:	ACOUSTICS ACOUSTICS NOT OTHERWISE PROVIDED FOR DEAF-AID SETS ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL MUSICAL INSTRUMENTS PHYSICS PUBLIC ADDRESS SYSTEMS SOUND-PRODUCING DEVICES
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	PURPOSE:To decrease noises by converting periodic noises to an electric signal and outputting the signal obtd. by inverting the phase of this electric signal and amplifying the signal as a sound. CONSTITUTION:A microphone 21 converts the periodic noises generated by the attachment and detachment of a magnetic tape 3 and a magnetic head 1 to the electric signal. The phase of the electric signal by these noises is inverted in a phase inversion circuit 22. The signal inverted in phase is amplified in an amplifier 23 and a speaker 24 converts this signal to the sound. The sound from the speaker 24, therefore, works to cancel the periodic noises. The periodic noises are attenuated in this way.