Patient monitoring systems, devices, and methods

A noninvasive blood pressure monitor comprising:

• an inflatable cuff;
• a pressure transducer;
• two or more air pumps, each of the air pumps having an operating speed;
• a plurality of air paths connecting the inflatable cuff, the pressure transducer, and the air pumps;
• an acoustic filter provided along at least one of the air paths;
• and
• a controller configured to determine one or more characteristics of acoustic noise produced by the first and second air pumps and to independently adjust the one or more operating characteristics of the first and second air pumps based on the one or more characteristics of the acoustic noise,
• wherein the controller is further configured to adjust the one or more operating characteristics of the first and second air pumps based on the one or more characteristics of the acoustic noise so as to reduce an acoustic displeasure metric, the acoustic displeasure metric being based on a beat frequency in the acoustic noise produced by the first and second air pumps.