Surgery – Sleep or relaxation inducing therapy – Sensory
Patent
1994-02-22
1996-07-09
Sykes, Angela D.
Surgery
Sleep or relaxation inducing therapy
Sensory
340573, C08B 2300
Patent
active
055339590
ABSTRACT:
A wireless audio monitoring system includes a reassurance tone generator for providing the user with assurance that a receiving unit is within range of the monitoring unit's transmitter and that both are operating properly. The reassurance signal is a brief audible tone transmitted at regular intervals by the monitoring unit to the receiving unit. The reassurance tone is either injected as sound into the monitoring unit's microphone, as an electronic signal into the microphone's amplifier or directly into the transmitter. A typical reassurance tone is a quarter-second long audible tone that occurs every ten seconds. At the receiving unit, the user has the option of either hearing or not hearing the reassurance tone by either eliminating the tone itself or by muting the loudspeaker during the time the reassurance tone is being received. Alternatively, the reassurance tone is turned on or off at the monitoring unit by means of a radio control signal sent from the receiving unit.
REFERENCES:
patent: 4101872 (1978-07-01), Pappas
patent: 4598272 (1986-07-01), Cox
patent: 4622544 (1986-11-01), Bially et al.
patent: 4785291 (1988-11-01), Hawthorne
patent: 4899135 (1990-02-01), Ghahariiran
patent: 5010890 (1991-04-01), Pfohl et al.
patent: 5119072 (1992-06-01), Hemingway
patent: 5307051 (1994-04-01), Sedlmayr
Ifland Dwight D.
Newman Perran V. L.
Zeller Niel P.
Gerry Baby Products Company
Gilbert Samuel
Sykes Angela D.
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