Active noise cancellation in an ophthalmic surgical system
AssigneeNovartis AG
InventorsKirk Wellington Todd, Johan Gustaf Ekvall, Paul J. Essex, Steven T. Charles, Nicholas Max Gunn
Life of this patent
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Abstract
Active noise cancellation is employed to address unwanted acoustical noise generated by various equipment associated with an ophthalmic surgical system. Active noise cancellation may be used within a chassis of the ophthalmic surgical system, within an air compressor used with the ophthalmic surgical system, and within a reciprocating surgical probe used with the ophthalmic surgical system.
Claims18
An ophthalmic surgical system comprising:
- a pneumatic actuator;
- an infusion system;
- a cooling fan;
- and
- an active noise cancellation system further comprising:
- a first microphone;
- a speaker;
- and
- a digital signal processor (DSP) having access to memory media storing instructions executable by the DSP to:
- detect a noise waveform captured by the first microphone, the noise waveform resulting from operation of at least one of the pneumatic actuator, the infusion system, and the cooling fan;
- generate a noise cancellation waveform to cancel the noise waveform;
- and
- cause the noise cancellation waveform to be output to the speaker.
A surgical air compressor for use in an operating room, the surgical air compressor comprising:
- an active noise cancellation system further comprising:
- a first microphone;
- a speaker;
- and
- a digital signal processor (DSP) having access to memory media storing instructions executable by the DSP to:
- detect a noise waveform captured by the first microphone, the noise waveform resulting from operation of the surgical air compressor to compress air;
- generate a noise cancellation waveform to cancel the noise waveform;
- and
- cause the noise cancellation waveform to be output to the speaker.
A reciprocating surgical probe for use in ophthalmic surgery, comprising:
- an active noise cancellation system further comprising:
- two pressure sensors;
- a speaker;
- and
- a logic controller having access to memory media and enabled to:
- detect actuation of the reciprocating surgical probe from a signal generated by at least one of the two pressure sensors, wherein the signal is indicative of a noise waveform generated by the reciprocating surgical probe during operation;
- retrieve, from the memory media, a noise cancellation waveform corresponding to the noise waveform;
- and
- cause the noise cancellation waveform to be output to the speaker.
Dependencies are inferred from the claim text.