[Problem] To enable presentation of sound in a more suitable manner even in a situation where a sound output unit with limited performance to output a part of frequency components is applied.

[Solution] A sensation induction device including: a vibration unit that has a long shape and vibrates in the long direction; and a support unit that supports the vibration unit in the vicinity of a portion where at least a part of a predetermined portion of a user contacts in a state where the user listens to sound, wherein vibration of the vibration unit is controlled on the basis of a part of frequency components included in sound to be output such that the vibration is associated with output of sound from a predetermined sound output unit.

Example embodiments provide a process that includes one or more of receiving an audio signal at a feedback compressor circuit, multiplying the received audio signal with a power feedback signal to create a product audio signal, wherein the feedback signal comprises a low-pass filtered signal, applying a power amplifier to the product audio signal, and providing the amplified product audio signal as an output signal to a speaker.

An audio signal output device (1) includes an audio signal output portion (15), a volume setting information acquisition portion (15), and a control portion (10). The control portion is configured to calculate the output volume of an external device on the basis of volume information of content and volume setting information of the external device and perform control of lowering the output volume of the external device in the case where the output volume is higher than a prescribed volume threshold.

Techniques are disclosed for synchronizing gain adjustments across a cascaded network of audio gain stages having variant operating delays. In particular, a delay-synchronized volume adjustment system configured in accordance with an embodiment of the present disclosure includes a controller operatively coupled to the cascaded network of audio and configured to apply gain adjustments in a synchronized manner that accounts for operating delays that are inherent to each gain stage. In an embodiment, the controller synchronously adjusts each gain stage relative to a corresponding operating delay such that gain adjustments fully propagate at substantially a same point in time within a given acceptable tolerance, and thus, eliminates or otherwise mitigates perceivable volume shifts when mixing audio from two or more audio sources.

Disclosed herein are methods and systems for intelligent dual-channel volume adjustment. One embodiment takes the form of a dual-watch mobile radio that includes a first receiver, a second receiver, an audio output port, a one-dimensional (1-D) volume control, and a controller programmed to carry out a set of functions. The set of functions includes receiving first and second audio signals from the first and second receivers, respectively, and generating first and second amplified audio signals at least in part by applying first and second signal gains to the first and second audio signals, respectively, as well as outputting the first and second amplified audio signals via the audio output port. The set of functions also includes receiving volume-control commands from the 1-D volume control, and responsively adjusting the first and second signal gains at least in part by applying a gain function to the first and second signal gains.

A virtual meeting system is discussed herein. An online meeting application places participants in their own virtual location with a common virtual meeting space and adjusts the audio volume and balance on a listener's device to simulate the virtual location of the participant who is speaking. The application includes a trigonometric function to adjust the audio volume and balance based on the location of the listener relative to the speaker. The application can also permit the participants to select their own virtual locations upon entry to the virtual meeting, can assign a virtual location or adjust audio based on a participant's settings, or can allow for parallel meetings.

A signal amplification method includes receiving, from a capacitive sensor, a first input signal by a first control terminal of a first transistor, and a second input signal by a first control terminal of a second transistor. The method also includes producing a first output signal, including amplifying a first signal at a first load path terminal of the first transistor using a first inverting amplifier having an output coupled to a resistance network, and producing a second output signal, including amplifying a second signal at a first load path terminal of the second transistor using a second inverting amplifier having an output coupled to the resistance network. The method also includes feeding back the first and second output signal to a second load path terminal of the first transistor and to a second load path terminal of the second transistor via the resistance network according to a pre-determined fraction.

This disclosure generally pertains to volume control of audio output by a device. A piecewise curve may be used to implement volume control using two or more curves segments. The piecewise curve may be implemented by a signal converter. The curve segments may be selected to provide volume control that provides incremental changes in amplification at mid-level to high level volumes, while providing anticipated amplification at lower volumes which satisfy users' expectations. In some instances, different piecewise curves may be selected for different types of audio so that these different types of audio are provided to users at an expected volume and/or in a meaningful way. When multiple audio outputs occur at a same time, the piecewise curves associated with some of the audio outputs may be dynamically adjusted or updated based on the presence of the other ones of the multiple audio outputs and/or ambient noise.

A display panel and manufacturing method thereof, and a display device and health monitoring method thereof. The display panel includes a base substrate and a sonic sensor disposed on the base substrate. The sonic sensor is configured to monitor a sonic wave.

An audio reproduction apparatus is shown and includes an amplifier with a power amplification stage having transistors in a push-pull arrangement. A bias generator biases the transistors with a standing current. A processor receives a data stream comprising digital samples of an analog audio signal and analyzes the peak level of each group. It then determines the appropriate standing currents to maintain Class A operation of the power amplification stage given the peak levels of each of the groups. A digital to analog converter produces an analog input signal for the input stage of the amplifier from the data stream. A feedforward path between the processor and the bias generator allows the standing current to be adjusted prior to the arrival of the analog input signal in the power amplification stage.