Abstract: A loudspeaker parameter system for vented box driver excursion modeling, may include a loudspeaker driver having a conductor, a magnet and a diaphragm. The system may further include a processor for excursion modeling configured to receive an input signal, determine a voltage level of the input signal, an enclosure having a resonant port, estimate port parameters including at least one of an acoustic resistance or acoustic mass, and apply a voltage limit based on the vented box excursion model utilizing the port parameters.

Abstract: A loudspeaker parameter system for vented box driver excursion modeling, may include a loudspeaker driver having a conductor, a magnet and a diaphragm. The system may further include a processor for excursion modeling configured to receive an input signal, determine a voltage level of the input signal, an enclosure having a resonant port, estimate port parameters including at least one of an acoustic resistance or acoustic mass, and apply a voltage limit based on the vented box excursion model utilizing the port parameters.

Abstract: A loudspeaker parameter system for vented box driver excursion modeling, may include a loudspeaker driver having a conductor, a magnet and a diaphragm. The system may further include a processor for excursion modeling configured to receive an input signal, determine a voltage level of the input signal, an enclosure having a resonant port, estimate port parameters including at least one of an acoustic resistance or acoustic mass, and apply a voltage limit based on the vented box excursion model utilizing the port parameters.

Abstract: A technique for controlling a loudspeaker system with an artificial neural network includes filtering, with a deconvolution filter, a measured system response of a loudspeaker and a reverberant environment in which the loudspeaker is disposed to generate a filtered response, wherein the measured system response corresponds to an audio input signal applied to the loudspeaker while the loudspeaker is disposed in the reverberant environment. The techniques further include generating, via a neural network model, an initial neural network output based on the audio input signal, comparing the initial neural network output to the filtered response to determine an error value, and generating, via the neural network model, an updated neural network output based on the audio input signal and the error value.

Abstract: A loudspeaker parameter system for vented box driver excursion modeling, may include a loudspeaker driver having a conductor, a magnet and a diaphragm. The system may further include a processor for excursion modeling configured to receive an input signal, determine a voltage level of the input signal, an enclosure having a resonant port, estimate port parameters including at least one of an acoustic resistance or acoustic mass, and apply a voltage limit based on the vented box excursion model utilizing the port parameters.

Abstract: A thermal model system for estimating a voice coil temperature of a loudspeaker that has frequency dependent parameters to model thermal behavior of the loudspeaker may include a loudspeaker having a voice coil and a magnet, and a thermal model configured to have multiple frequency dependent thermal circuits including the voice coil and the magnet that determine a voice coil temperature which is used to limit input to the loudspeaker to prevent thermal overload of the loudspeaker.

Abstract: A technique for controlling a loudspeaker system with an artificial neural network includes filtering, with a deconvolution filter, a measured system response of a loudspeaker and a reverberant environment in which the loudspeaker is disposed to generate a filtered response, wherein the measured system response corresponds to an audio input signal applied to the loudspeaker while the loudspeaker is disposed in the reverberant environment. The techniques further include generating, via a neural network model, an initial neural network output based on the audio input signal, comparing the initial neural network output to the filtered response to determine an error value, and generating, via the neural network model, an updated neural network output based on the audio input signal and the error value.

Abstract: A technique for controlling a loudspeaker system with an artificial neural network includes filtering, with a deconvolution filter, a measured system response of a loudspeaker and a reverberant environment in which the loudspeaker is disposed to generate a filtered response, wherein the measured system response corresponds to an audio input signal applied to the loudspeaker while the loudspeaker is disposed in the reverberant environment. The techniques further include generating, via a neural network model, an initial neural network output based on the audio input signal, comparing the initial neural network output to the filtered response to determine an error value, and generating, via the neural network model, an updated neural network output based on the audio input signal and the error value.

Abstract: A loudspeaker real-time state variable prediction system may include a loudspeaker having a voice coil and a magnet, and a non-linear excursion model configured to estimate non-linear excursion of the loudspeaker. The system may further include a thermal model configured to utilize thermal parameters and frequency based on at least one thermal property of the loudspeaker, and a gain adjustment thermal limiter configured to apply a gain reduction an incoming audio signal to protect the loudspeaker from thermal overload.

Abstract: A non-linear excursion estimations system for estimating non-linear excursion of a loudspeaker may include a loudspeaker having a force transducer, and a controller programmed to limit excursion of the loudspeaker by modeling at least one constrained nonlinearity curve based on an asymptote outside of a safe operating area (SOA) nonlinearly curve of the loudspeaker.

Abstract: A non-linear excursion estimations system for estimating non-linear excursion of a loudspeaker may include a loudspeaker having a force transducer, and a controller programmed to limit excursion of the loudspeaker by modeling at least one constrained nonlinearity curve based on an asymptote outside of a safe operating area (SOA) nonlinearly curve of the loudspeaker.

Abstract: A thermal model system for estimating a voice coil temperature of a loudspeaker that has frequency dependent parameters to model thermal behavior of the loudspeaker may include a loudspeaker having a voice coil and a magnet, and a thermal model configured to have multiple frequency dependent thermal circuits including the voice coil and the magnet that determine a voice coil temperature which is used to limit input to the loudspeaker to prevent thermal overload of the loudspeaker.

Abstract: A loudspeaker real-time state variable prediction system may include a loudspeaker having a voice coil and a magnet, and a non-linear excursion model configured to estimate non-linear excursion of the loudspeaker. The system may further include a thermal model configured to utilize thermal parameters and frequency based on at least one thermal property of the loudspeaker, and a gain adjustment thermal limiter configured to apply a gain reduction an incoming audio signal to protect the loudspeaker from thermal overload.

Abstract: A loudspeaker baffle that provides variable sound patterns is described. The baffle may support non-low frequency sound sources and a waveguide to provide varying sound beam patterns. The baffle may include a center mount adapted to receive a plurality of audio outputs and a plurality of low frequency apertures to receive a plurality low frequency output. The waveguide may be formed from a front face of the baffle. The front face may be intermediate the center mount and the low frequency apertures. The front face may include a continuously varying waveguide surface with a first waveguide portion adjacent a first audio output of the plurality of audio outputs providing a first sound pattern and a second waveguide portion adjacent a second audio output of the plurality of audio outputs providing a second sound pattern that is different than the first sound pattern.

Abstract: An audio system is described that corrects for linear and nonlinear distortions. The system can include a physical loudspeaker system responsive to an audio input signal, an adaptive circuit, e.g., with a recurrent neural network, to correct for non-linear distortions from the loudspeaker.

Abstract: An acoustic system that includes an acoustic assembly and a sound system. The acoustic assembly at least includes a tube removably attached to a compression driver. Additionally, the acoustic assembly includes either a waveguide or a deflector. Either the waveguide or the deflector is also removably attached to the tube. The sound system communicates with the acoustic assembly and includes a filter. The filter includes a filter length that is based on an impulse response of the acoustic assembly. As part of the communication, the sound system sends an audio signal, which has been filtered by the filter, to the acoustic assembly. In response to the audio signal, the compression driver generates a sound wave that travels through the acoustic assembly. While traveling, the acoustic assembly transitions the sound wave from generally traveling in a first direction to a second direction.

Abstract: An audio system is described that corrects for linear and nonlinear distortions. The system can include a physical loudspeaker system responsive to an audio input signal, an adaptive circuit, e.g., with a recurrent neural network, to correct for non-linear distortions from the loudspeaker.

Abstract: An acoustic system that includes an acoustic assembly and a sound system. The acoustic assembly at least includes a tube removably attached to a compression driver. Additionally, the acoustic assembly includes either a waveguide or a deflector. Either the waveguide or the deflector is also removably attached to the tube. The sound system communicates with the acoustic assembly and includes a filter. The filter includes a filter length that is based on an impulse response of the acoustic assembly. As part of the communication, the sound system sends an audio signal, which has been filtered by the filter, to the acoustic assembly. In response to the audio signal, the compression driver generates a sound wave that travels through the acoustic assembly. While traveling, the acoustic assembly transitions the sound wave from generally traveling in a first direction to a second direction.

Abstract: A loudspeaker configured to provide asymmetrical beam coverage. A first group of drivers to outputs a first beam pattern. A second group of drivers, which is different from the first group of drivers, is configured to output a second beam pattern. A transmission line is adapted to output signals to the first driver group and the second driver group to provide an asymmetrical beam pattern. The first driver group outputs a beam pattern different than the second driver group. This can improve acoustic coverage, e.g., sound pressure levels, in the acoustic environment. In an example, the transmission line is separated into two distinct parts that feeds the first driver group and the second driver group respectively.

Abstract: A loudspeaker baffle that provides variable sound patterns is described. The baffle may support non-low frequency sound sources and a waveguide to provide varying sound beam patterns. The baffle may include a center mount adapted to receive a plurality of audio outputs and a plurality of low frequency apertures to receive a plurality low frequency output. The waveguide may be formed from a front face of the baffle. The front face may be intermediate the center mount and the low frequency apertures. The front face may include a continuously varying waveguide surface with a first waveguide portion adjacent a first audio output of the plurality of audio outputs providing a first sound pattern and a second waveguide portion adjacent a second audio output of the plurality of audio outputs providing a second sound pattern that is different than the first sound pattern.