EAR-RELATED DEVICES IMPLEMENTING SENSORS TO ACQUIRE PHYSIOLOGICAL CHARACTERISTICS
Various embodiments relate generally to electrical and electronic hardware, computer software, wired and wireless network communications, and wearable computing and audio devices for monitoring health and wellness. More specifically, disclosed are an apparatus and a method for processing signals representing physiological characteristics sensed from tissue at or adjacent an ear of an organism. In one or more embodiments, a wearable device includes one or more sensor terminals, one or more physiological sensors configured to sense one or more signals originating at the one or more sensor terminals. At least one sensor terminal includes a pressure-sensitive terminal configured to detect a pressure exerted by a portion of tissue of an organism and generate a pressure signal representing a value of the pressure. Further, the wearable device can include a processor configured to cause generation of data representing a physiological characteristic of the organism based on the pressure signal.
1 . A method comprising:
receiving one or more signals from one or more sensor terminals, the one or more sensor terminals being disposed to contact portions of tissue at or in an ear of an organism;
detecting an amount of pressure as a first signal associated with a sensor terminal of the one or more sensor terminals;
determining a physiological characteristic of the organism based on the amount of the pressure; and
generating data representing the physiological characteristic.
2 . The method of claim 1 , wherein detecting the amount of pressure comprises:
receiving a signal representing a value of a resistance responsive to the amount of pressure.
3 . The method of claim 2 , wherein determining the physiological characteristic comprises:
determining a heart-related characteristic.
4 . The method of claim 2 , further comprising:
implementing a force-sensing resistor to determine generate the value of the resistance responsive to the amount of pressure.
5 . The method of claim 1 , further comprising:
detecting a value associated with a second signal associated with the sensor terminal or another terminal of the one or more sensors terminals.
6 . The method of claim 5 , further comprising:
correlating the first signal and the second signal to form a correlated signal; and
implementing the correlated signal to form the data representing the physiological characteristic.
7 . The method of claim 5 , further comprising:
detecting an invalid portion of the first signal and the second signal; and
implementing the other of the first signal and the second signal to form the data representing the physiological characteristic.
8 . The method of claim 1 , further comprising:
causing positioning of the sensor terminal to contact an outer surface of tissue associated with a targus region of the ear; and
receiving the first signal from the outer surface.
9 . The method of claim 1 , further comprising:
causing positioning of the sensor terminal to contact an inner surface of tissue associated with a targus region of the ear; and
receiving the first signal from the inner surface.
10 . The method of claim 1 , wherein determining the physiological characteristic comprises:
determining a heart rate.
11 . A wearable device comprising:
one or more sensor terminals;
one or more physiological sensors coupled to the one or more sensor terminals, the one or more physiological sensors configured to sense one or more signals originating at the one or more sensor terminals, at least a sensor terminal of the one or more sensor terminals comprising:
a pressure-sensitive terminal configured to detect a pressure exerted by a portion of tissue of an organism and generate a pressure signal representing a value of the pressure; and
a processor configured to receive the one or more signals, including the pressure signal, and further configured to cause generation of data representing a physiological characteristic of the organism.
12 . The wearable device of claim 11 , wherein the pressure-sensitive terminal comprises:
a force-sensing resistor (“FSR”).
13 . The wearable device of claim 11 , wherein the processor is further configured to cause generation of the data as a heart rate.
14 . The wearable device of claim 11 , further comprising:
an extension structure configured to position the one or more sensor terminals to contact portions of tissue at or in an ear of an organism, and is further configured to apply one or more forces to the one or more sensor terminals to maintain contact with the portions of tissue.
15 . The wearable device of claim 14 , wherein at least a portion of the extension structure includes the sensor terminal, the portion of the extension structure being oriented facilitate coupling between the sensor terminal and a surface of a targus region of an ear of the organism.
16 . The wearable device of claim 11 , further comprising:
a first physiological sensor including the pressure-sensitive terminal;
a second physiological sensor; and
sensor controller configured to select either the first physiological sensor or the second physiological sensor, or both, to receive the receive the one or more signals.
17 . The wearable device of claim 16 , wherein the second physiological sensor comprises:
a bioimpedance sensor.
18 . The wearable device of claim 16 , wherein the second physiological sensor comprises:
a piezoelectric sensor.
19 . The wearable device of claim 16 , wherein the second physiological sensor comprises:
a skin surface microphone (“SSM”).
20 . The wearable device of claim 11 , further comprising one or more of an image capture device and an environmental sensor.