Abstract: An audio system is provided with at least two low frequency transducers to project sound within a room and a portable device with at least two microphones to receive sound at the first listening location from multiple directions. A microcontroller is programmed to provide a calibration command in response to a user input, and to provide a measurement signal indicative of the sound received by the microphone array. A processor is programmed to provide a test signal in response to receiving the calibration command, wherein each low frequency transducer is adapted to generate a test sound in response to the test signal. The processor is further programmed to: process the measurement signal to predict a sound response at a second listening location adjacent to the first listening location, and adjust a sound setting associated with each low frequency transducer to optimize sound at the first and second listening locations.

Abstract: Disclosed embodiments include techniques for generating a low-frequency sound field for an audio system. A computing device in the audio system determines that a first playback level of an audio input is less than a maximum playback level of the audio system. Based on the first playback level, the computing device retrieves one or more first parameters associated with a first loudspeaker included in the audio system, where the one or more first parameters decrease a first cutoff frequency of the first loudspeaker to a second cutoff frequency. The computing device modifies a first portion of an audio signal transmitted to the first loudspeaker to decrease the first cutoff frequency to the second cutoff frequency based on the one or more first parameters.

Abstract: A headphone assembly includes a headband that is coupled to an outer ring, an elastic sheet that is coupled to the outer ring, and a headphone cup that is suspended within the outer ring by the elastic sheet. In some embodiments, the elastic sheet is configured to press the headphone cup against at least one of a portion of a head of a user or a pinna of an ear of the user.

Abstract: In some embodiments, an apparatus includes an audio generating element; a sleeve including a longitudinal channel, an outer surface of the sleeve including at least a first portion that is expandable in a cross-sectional size in at least one direction; and a rigid insert configured for insertion into the longitudinal channel. At least the first portion of the outer surface of the sleeve expands in the at least one direction when the rigid insert is inserted into the longitudinal channel.

Abstract: In various embodiments, a method includes receiving a first audio channel signal; causing a first driver and a second driver of an audio output device to output a first frequency range of the first audio channel signal with a first power output; causing the first driver to output a second frequency range of the first audio channel signal with a second power output; and causing the second driver to output the second frequency range of the first audio channel signal with a third power output that is higher than the second power output, wherein the second frequency range is higher than the first frequency range.

Abstract: A headphone system includes an audio output device, an ear pad coupled to a first side of the audio output device, and an inflatable pouch coupled to a second side of the audio output device. In some embodiments, the inflatable pouch inflates in at least a direction away from the second side of the audio output device.

Abstract: A computer-implemented method comprises identifying an audio playback device configured to reproduce audio content based on an audio input signal, wherein the audio playback device has a previously measured characteristic frequency response; retrieving the previously measured characteristic frequency response associated with the audio playback device; generating, based on the previously measured characteristic frequency response and a preferred frequency response curve for a plurality of users, a frequency response filter that modifies the previously measured characteristic frequency response of the audio playback device to a modified frequency response; processing the audio input signal with the frequency response filter to generate a filtered audio signal that differs in relative amplitude from the audio input signal in one or more frequency bands; and causing the audio playback device to play back the filtered audio signal.

Abstract: A memory stores a linear model predicting a preference rating for in-ear headphones. A processor is programmed to generate a headphone response curve defining a frequency response of a headphone, apply the linear model to the headphone response curve to determine a preference rating, and provide the preference rating to predict overall sound quality of the in-ear headphone without listening tests.

Abstract: A method of audio signal processing, the method comprising: accessing user-specific audio processing information for a particular user; determining identity information of an audio device for producing sound output from an audio signal; based on the identity information of the audio device, accessing device-specific audio processing information for the audio device; generating a customized audio-processing procedure for the audio signal based on the user-specific audio processing information and the device-specific audio processing information; and generating a customized audio signal by processing the audio signal with the customized audio-processing procedure.

Abstract: A computer-implemented method comprises identifying an audio playback device configured to reproduce audio content based on an audio input signal, wherein the audio playback device has a previously measured characteristic frequency response; retrieving the previously measured characteristic frequency response associated with the audio playback device; generating, based on the previously measured characteristic frequency response and a preferred frequency response curve for a plurality of users, a frequency response filter that modifies the previously measured characteristic frequency response of the audio playback device to a modified frequency response; processing the audio input signal with the frequency response filter to generate a filtered audio signal that differs in relative amplitude from the audio input signal in one or more frequency bands; and causing the audio playback device to play back the filtered audio signal.

Abstract: A memory stores a linear model predicting a preference rating for in-ear headphones. A processor is programmed to generate a headphone response curve defining a frequency response of a headphone, apply the linear model to the headphone response curve to determine a preference rating, and provide the preference rating to predict overall sound quality of the in-ear headphone without listening tests.

Abstract: A smart speaker device for acoustical listening area mapping and frequency correction includes a non-transitory storage configured to maintain a listening area response map indicating filter settings corresponding to each of a plurality of locations within a listening area, a microphone array, a loudspeaker; and a controller. The controller is programmed to execute a frequency correcting application to identify a current location of a mobile device in the listening area based on ultrasonic audio received to the microphone array from the mobile device, access the listening area response map to retrieve filter settings corresponding to the current location, and apply the filter settings to an audio stream to be output to the loudspeaker to correct for frequency response of the loudspeaker at the current location of the mobile device.

Abstract: A smart speaker device for acoustical listening area mapping and frequency correction includes a non-transitory storage configured to maintain a listening area response map indicating filter settings corresponding to each of a plurality of locations within a listening area, a microphone array, a loudspeaker; and a controller. The controller is programmed to execute a frequency correcting application to identify a current location of a mobile device in the listening area based on ultrasonic audio received to the microphone array from the mobile device, access the listening area response map to retrieve filter settings corresponding to the current location, and apply the filter settings to an audio stream to be output to the loudspeaker to correct for frequency response of the loudspeaker at the current location of the mobile device.

Abstract: A method of audio signal processing, the method comprising: accessing user-specific audio processing information for a particular user; determining identity information of an audio device for producing sound output from an audio signal; based on the identity information of the audio device, accessing device-specific audio processing information for the audio device; generating a customized audio-processing procedure for the audio signal based on the user-specific audio processing information and the device-specific audio processing information; and generating a customized audio signal by processing the audio signal with the customized audio-processing procedure.

Abstract: A headphone response error curve (HREC) may be calculated based on a difference in response between a headphone response curve for a headphone to be evaluated and a target headphone response curve. A linear model may be applied to the headphone response curve to determine a preference rating predicting overall sound quality of the headphone. The linear model may be developed using independent variables such as mean error (ME) of the headphones response curve to the target response curve, standard deviation (SD) of error of the HREC, or absolute value of a slope (AS) of a logarithmic regression line of the HREC.

Abstract: Headphones are provided with a pair of speakers adapted to be suspended a distance away from the listener's ears and movable between a plurality of test positions. At least one microphone is adapted to be positioned near one of the listener's ears. A controller is in communication with the pair of speakers. The controller is programmed to activate the pair of speakers to produce a test sound at a plurality of test positions. The controller receives playback signals from the microphone based on each of the test sounds at the plurality of test positions. A head related transfer function (HRTF) is determined based on the playback signals received by the microphones.

Abstract: A wearable device worn on the head of a user determines the head orientation of the user. A tracking application executing on the wearable device determines the orientation of the wearable device relative to a frame of reference. A mobile application executing on a mobile device likewise determines the orientation of the mobile device relative to the frame of reference. The frame of reference may be magnetic north or an inertial reference frame shared between the wearable device and the mobile device. The tracking application estimates the head orientation of the user, relative to the mobile device, based on the relative orientations of the wearable device and the mobile device.

Abstract: A system is provided for configuring an audio system for a given space. The system may statistically analyze potential configurations of the audio system to configure the audio system. The potential configurations may include positions of the loudspeakers, numbers of loudspeakers, types of loudspeakers, listening positions, correction factors, or any combination thereof. The statistical analysis may indicate at least one metric of the potential configuration including indicating consistency of predicted transfer functions, flatness of the predicted transfer functions, differences in overall sound pressure level from seat to seat for the predicted transfer functions, efficiency of the predicted transfer functions, or the output of predicted transfer functions.

Abstract: A system is provided for configuring an audio system for a given space. The system may statistically analyze potential configurations of the audio system to configure the audio system. The potential configurations may include positions of the loudspeakers, numbers of loudspeakers, types of loudspeakers, listening positions, correction factors, or any combination thereof. The statistical analysis may indicate at least one metric of the potential configuration including indicating consistency of predicted transfer functions, flatness of the predicted transfer functions, differences in overall sound pressure level from seat to seat for the predicted transfer functions, efficiency of the predicted transfer functions, or the output of predicted transfer functions.

Abstract: A system is provided for configuring an audio system for a given space. The system may statistically analyze potential configurations of the audio system to configure the audio system. The potential configurations may include positions of the loudspeakers, numbers of loudspeakers, types of loudspeakers, listening positions, correction factors, or any combination thereof. The statistical analysis may indicate at least one metric of the potential configuration including indicating consistency of predicted transfer functions, flatness of the predicted transfer functions, differences in overall sound pressure level from seat to seat for the predicted transfer functions, efficiency of the predicted transfer functions, or the output of predicted transfer functions.