The present disclosure relates to circuitry for selecting a bias voltage to output at a bias voltage output node of the circuitry. The circuitry comprises a first circuit node configured to receive a first voltage from a first, unregulated, voltage source and a second circuit node configured to receive a second voltage from a second, regulated, voltage source. A switch arrangement configured to selectively couple the bias voltage output node to the first circuit node or the second circuit node is also provided.

A method for in-ear detection, the method may include transmitting test signals, by a speaker of an earbud, during a test period, and while the earbud is operating at a first operational mode, wherein the test signals comprise at least one first test signal within a first frequency range, at least one second test signal within a second frequency range, and at one third test signal within a third frequency range; wherein the first frequency range, the second frequency range and the third frequency range differ from each other and are within a human auditory range; generating, by a feedback microphone of the earbud, sensed information that is indicative of audio signals sensed by the feedback microphone as a result of the transmitting of the test signals; and determining whether the earbud is located within an ear of a person, wherein the determining is based on the sensed information and a reference out of ear spectrum.

Disclosed are a TWS earphone, a method and apparatus for reducing earphone energy consumption, and a computer-readable storage medium. The method for reducing earphone energy consumption comprises: determining whether a target earphone is in an off-ear state and is not placed in a charging case; if so, acquiring a timekeeping duration since the target earphone is taken off of an ear; determining whether the timekeeping duration exceeds a first preset threshold value; and if the timekeeping duration exceeds the first preset threshold value, performing energy consumption reduction processing on the earphone. According to the present application, the duration since an earphone is taken off of an ear is evaluated for the earphone that is taken off of the ear and is not placed in a charging case, so as to perform energy consumption reduction processing on the earphone that has been taken off of the ear for a relatively long duration, such that unnecessary power consumption of the earphone when same is in a not-in-use state can be effectively reduced, and the effective service time of the earphone after charging is prolonged.

A wearable device is provided and includes a plurality of speakers including a first speaker, a second speaker, and an N.sup.th speaker, a plurality of digital to analog converter (DAC)s including a first DAC connected to the first speaker, a second DAC connected to the second speaker, and an N.sup.th DAC connected to the N.sup.th speaker, an audio signal processing module including N DAC output paths configured to filter an audio signal according to each frequency band and output the audio signal, a memory; and a processor electrically connected to the plurality of DACs, the audio signal processing module, and the memory, wherein the memory includes instructions causing the processor to, when the audio signal is reproduced, analyze a frequency component included in the audio signal, activate the N DAC output paths when the frequency component included in the audio signal has a full band range, activate only a DAC output path for processing a specific frequency band among the N DAC output paths when the frequency component included in the audio signal has only the specific frequency band, and output the audio signal through a speaker connected to the activated DAC output path.

According to an embodiment, an electronic device may include a Bluetooth communication circuit and at least one processor. The at least one processor may be configured to: perform a first communication connection based on a first Bluetooth communication with a first audio electronic device having a first Bluetooth address by using the Bluetooth communication circuit, receive, from a second audio electronic device having the first Bluetooth address, a second communication connection request based on the first Bluetooth communication while performing the first communication connection, transmit, to the second audio electronic device, a second communication connection request response signal including rejection information for the received second communication connection request by using the Bluetooth communication circuit due to the first communication connection, and transmit, to the first audio electronic device, a message related to the rejection information for the second communication connection request through the first communication connection. Other embodiments are possible.

In some embodiments, a calibration circuit can include a first circuit configured to generate a first output voltage based on a first reference voltage, and a second circuit configured to compare the first output voltage and a second reference voltage. The calibration circuit can further include a calibration block configured to provide an adjustment to the first circuit based on the comparison of the first output voltage and the second reference voltage, with the adjustment being configured to compensate for a change in the first reference voltage. In some embodiments, such a calibration circuit can be utilized for and/or be a part of a digital-to-analog converter for wireless audio applications.

In some embodiments, a system comprises a host computing device and an audio device communicatively coupled to the host device and including at least one speaker and a plurality of light emitters. The host computing device can include a processor(s) and one or more machine-readable, non-transitory storage mediums with instructions configured to cause the processor(s) of the host computing device to perform operations including receiving user environment data by one or more sensors of the host computing device, receiving user selection data corresponding to a selected mode of operation of the audio device, determining a characterization profile of a surrounding environment of the user based on the user environment data, and sending the characterization profile to the audio device, the characterization profile configured to cause the audio device to control the plurality of light emitters based on the characterization profile and the selected mode of operation.

A wearable device, comprising: one or more processors configured to: detect a wear status of the wearable device; and in response to the wear status, allocate resources of the wearable device to one or more functions of the wearable device.

A computing system comprising one or more electronic computing devices receives data from a hearing-assistance device. The computing system determines, based on the data received from the hearing-assistance device, a cognitive benefit measure for a wearer of the hearing-assistance device. The cognitive benefit measure being an indication of a change of a cognitive benefit of the wearer of the hearing-assistance device attributable to use of the hearing-assistance device by the wearer of the hearing-assistance device. The computing device outputs an indication of the cognitive benefit measure.

Electronic headphones that are operational when worn or placed on the head of a wearer and are non-operational when the electronic headphones are not worn. In exemplary embodiments, one or more sensors in the electronic headphones may detect this change of position of the earcups/pivot arms of the headset which indicates the wearer is no longer wearing the electronic headphones and put the electronic headphones in a non-operational state. Correspondingly, when placed on the head of a wearer, the sensor(s) detect the change of position of the electronic headphones which indicates the wearer is wearing the electronic headphones and puts the electronic headphones in an operational state.