The disclosure presents a method and an amplifier system for minimizing variation in an acoustical signal caused by variation in gain of an amplifier, comprising a battery for providing a supply voltage to the amplifier, a digital signal processor for providing the acoustical signal to the amplifier, a controller unit receiving an enablement signal when the supply voltage is in an offset mode, and based on the enablement signal requesting a measured voltage during a time period, and a first analog-to-digital converter configured for measuring the supply voltage to the amplifier when receiving the request from the controller unit or the first analog-to-digital converter is configured for measuring the supply voltage to the amplifier continuously, and where variations in the measured voltage relates to variations in the supply voltage during the time period. Furthermore, the controller unit is configured to predict offset modes (i.e. changes) in the supply voltage based on the enablement signals and a fitting of the measured voltages, and wherein the controller unit is configured to generate a compensating signal based on the fitting and transmit the compensating signal to the digital signal processor, the digital signal processor is then configured to minimize variation in the acoustical signal at the output of the amplifier by compensating the variation in gain of the amplifier based on the compensating signal.

Disclosed herein, among other things, are systems and methods for a hearing device antenna. One aspect of the present subject matter includes a hearing device configured to be worn in an ear of a wearer to perform wireless communication. The hearing device includes a housing, hearing electronics within the housing, and an inverted F antenna or loop antenna disposed at least partially in the housing and configured for performing 2.4 GHz wireless communication. In various embodiments, at least a portion of the antenna protrudes from an exterior of the housing.

In accordance with the present disclosure a hearing instrument is provided. The hearing instrument comprises a wireless communication unit for wireless communication, a speaker interconnected with the wireless communication unit and being configured to provide an output audio signal, a battery configured to supply power to the hearing instrument, a filter circuit interconnecting the battery and a power management circuit of the hearing instrument, the wireless communication unit being interconnected with the battery, the battery being configured for emission and reception of an electromagnetic field having an RF wavelength. The filter circuit is configured to de-couple the battery and the power management circuit at frequencies above 3 MHz and configured to connect the battery to the power management circuit at frequencies below 300 kHz.

Power management for an integrated circuit. At least one example embodiment is a method of operating an integrated circuit on a semiconductor substrate, the method comprising: measuring, by a body voltage controller, a signal indicative of power consumption of devices on the semiconductor substrate, the body voltage controller implemented on the semiconductor substrate; creating, by the body voltage controller, a value indicative of a modified body voltage, the creating based on the signal indicative of power consumption; and modifying, by a body voltage converter on the semiconductor substrate, a body voltage applied to a plurality of transistors on the semiconductor substrate, the modification responsive to the value indicative of the modified body voltage.

A hearing aid has an input transducer, a signal processing device and an output transducer. Furthermore, the hearing aid has an inductive receiver, wherein the inductive receiver contains a tunnel magnetoresistance (TMR) sensor. The inductive receiver is configured to receive audio signals of an inductive hearing system. A DC voltage converter is disposed upstream of the TMR sensor, and the DC voltage converter is upstream of the input transducer.

A hearing aid is shown and described. The hearing aid includes a body portion having a microphone, an earplug in communication with the body, portion having a speaker, a battery and visible and audible beacons disposed in the body portion, and circuitry or programming designed to provide a spatialization function. The hearing aid includes a material having coloring corresponding to the skin pigmentation of a user. The hearing aid is designed to maintain a reserve level of battery power. The hearing aid is waterproof, and can be controlled by a remote controller or telephone application.

A processor comprises instructions to adjust a bias of an input signal in order to decrease a duty cycle of a pulse modulated optical signal. The bias can be increased, decreased, or maintained in response to one or more measured values of the signal. In many embodiments, a gain of the signal is adjusted with the bias in order to inhibit distortion. The bias can be adjusted slowly in order to inhibit audible noise, and the gain can be adjusted faster than the bias in order to inhibit clipping of the signal. In many embodiments, one or more of the bias or the gain is adjusted in response to a value of the signal traversing a threshold amount. The value may comprise a trough of the signal traversing the threshold.

A hearing instrument comprises a wireless communication unit interconnected with an antenna for emission and reception of an electromagnetic field having an RF wavelength, a speaker interconnected with the wireless communication unit and being configured to provide an output audio signal. A battery is configured to supply power to the hearing instrument and a filter circuit interconnects the battery and a power management circuit of the hearing instrument. The antenna extends from a feed and at least a part of the antenna being is arranged adjacent the battery. A distance between the at least part of the antenna and the battery is below 1/40 of the wavelength. The filter circuit is configured to de-couple the battery and the power management circuit at frequencies above 3 MHz and configured to connect the battery to the power management circuit at frequencies below 300 kHz.

A system includes: first and second hearing devices, each hearing device comprising an output transducer, a wireless communication unit, an antenna, and a power supply having primary and secondary voltage sources, wherein the secondary voltage source provides a lower voltage than the primary voltage source; and a detector arrangement to provide a quality indicator indicative of a quality of a wireless link between the first and second hearing devices, wherein each of the first and second hearing devices comprises a control unit configured to operate the respective hearing device in: when the quality indicator is above a threshold, a first power mode in which the respective hearing device uses its secondary voltage source to drive transmission with its antenna, and when the quality indicator is below the threshold, a second power mode in which the respective hearing device uses its primary voltage source to drive transmission with its antenna.

A processor comprises instructions to adjust a bias of an input signal in order to decrease a duty cycle of a pulse modulated optical signal. The bias can be increased, decreased, or maintained in response to one or more measured values of the signal. In many embodiments, a gain of the signal is adjusted with the bias in order to inhibit distortion. The bias can be adjusted slowly in order to inhibit audible noise, and the gain can be adjusted faster than the bias in order to inhibit clipping of the signal. In many embodiments, one or more of the bias or the gain is adjusted in response to a value of the signal traversing a threshold amount. The value may comprise a trough of the signal traversing the threshold.