Abstract: An optical heart rate earphone includes a front housing, a circuit board assembly, a rear housing assembled to a rear end of the front housing, and a light pipe. The front housing has a sound tube. At least one portion of the sound tube forms at least one light transmission gap. The circuit board assembly includes a circuit board and at least one optical sensor. The at least one optical sensor is corresponding to the at least one light transmission gap. The light pipe has a circular base. At least one portion of a periphery of the base protrudes rearward to form at least one transmittance slice. The light pipe is assembled to the sound tube. The at least one transmittance slice is wedged in the at least one light transmission gap.

Abstract: An optical heart rate earphone includes a front housing, a circuit board assembly, a rear housing assembled to a rear end of the front housing, and a light pipe. The front housing has a sound tube. At least one portion of the sound tube forms at least one light transmission gap. The circuit board assembly includes a circuit board and at least one optical sensor. The at least one optical sensor is corresponding to the at least one light transmission gap. The light pipe has a circular base. At least one portion of a periphery of the base protrudes rearward to form at least one transmittance slice. The light pipe is assembled to the sound tube. The at least one transmittance slice is wedged in the at least one light transmission gap.

Abstract: A vital signs measurement system includes a plurality of light sources emitting into a subject's skin. A plurality of photo sensors receives lights reflected from the subject's skin and converts the lights to a plurality of signals. A processing module receives the plurality of signals and transforms the plurality of signals to a PPG signal by analyzing a correlation coefficient between every two ones of the plurality of signals. The vital signs measurement system improves the measurement accuracy of the physiological information of the participant by the correlation coefficient.

Abstract: A vital sign measurement system includes an excitation signal source, a vital sign sensor, an environmental sensor, an analog front-end sensor electrically connected with the vital sign sensor, and a processor module electrically connected with the excitation signal source, the environmental sensor and the analog front-end sensor. The excitation signal source generates excitation signals. The excitation signals are transmitted to a human body, and then the excitation signals are reflected to generate sensing signals. The vital sign sensor receives the sensing signals, and the sensing signals are converted into a plurality of analog synthetic signals. The environmental sensor receives environmental light. The analog front-end sensor receives and amplifies the analog synthetic signals. The processor module calculates an intensity of the environmental light. And the processor module sends an adjustment instruction to the analog front-end sensor to adjust a sampling frequency of the analog front-end sensor.

Abstract: The smart hearing amplifier device is placed in an ear of a user to receive voices of speakers. The smart hearing amplifier device includes a Bluetooth chipset, a photoplethysmography (PPG) sensor, a gravity-sensor (G sensor) and a microcontroller unit (MCU). The PPG sensor emits lights onto the skin of the ear and captures reflected lights from the skin and then outputs PPG signals. The G sensor senses a triaxial gravitational variation of the user and then outputs sensed signals. The MCU is connected with the PPG sensor, the G sensor and the Bluetooth chipset. The MCU processes PPG signals from the PPG sensor and the sensed signals from the G sensor and eliminates noise signals of the PPG signals and the sensed signals, and then calculates bio-data of the user. The Bluetooth chipset receives the bio-data from the MCU and transmits the bio-data to a smart device.

Abstract: A heart rate detection earphone is worn on an auricle which has a cavitas conchae. The heart rate detection earphone includes an earphone body matched with and buckled in the auricle, a light guiding module disposed to the earphone body, and an optical sensor. The light guiding module defines a sensing surface exposed out of the earphone body, and the sensing surface abuts against the cavitas conchae. The optical sensor includes a light emitter and a light receiver respectively coupled with the light guiding module. Light beams emitted by the light emitter are guided by the light guiding module to irradiate the cavitas conchae. The light beams emitted by the light emitter are reflected by the cavitas conchae, and then the reflected light beams reflected by the cavitas conchae are returned to and are received by the light receiver through the light guiding module.

Abstract: A vital signs measurement system includes a plurality of light sources emitting into a subject's skin. A plurality of photo sensors receives lights reflected from the subject's skin and converts the lights to a plurality of signals. A processing module receives the plurality of signals and transforms the plurality of signals to a PPG signal by analyzing a correlation coefficient between every two ones of the plurality of signals. The vital signs measurement system improves the measurement accuracy of the physiological information of the participant by the correlation coefficient.