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Audio apparatus having electronic graphic equalizer
The Journal of the Acoustical Society of America, 1993An audio apparatus includes an electronic graphic equalizer, in which a plurality of frequency characteristics corresponding to various space configurations are stored preliminarily and a plurality of frequency characteristics corresponding to various types of music are also stored preliminarily.
Hiroshi Ozawa, Shiro Horii, Ichiro Hondo
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Multipoint equalization of digital car audio systems
2009 Proceedings of 6th International Symposium on Image and Signal Processing and Analysis, 2009In this paper a novel approach for automotive sound system enhancement based on multipoint equalization is presented. Beginning from well known techniques applied to room equalization issues, a frequency domain algorithm that combines fractional octave smoothing of measured impulse responses (IRs) in multiple locations is developed.
Stefania Cecchi
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On Perceptual Audio Equalization for Multiple Users in Presence of Ambient Noise
2018 IEEE 10th Sensor Array and Multichannel Signal Processing Workshop (SAM), 2018There are many situations where ambient noise can disturb the listening of music through loudspeakers, the most usual inside cars, trains or airplanes. A common solution is to listen to the music through headphones, but in some cases, as for the car driver, it is not allowed. Even for the rest of the passengers of a car, it would be more comfortable to
Juan Estreder +4 more
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A ten-channel equalizer for digital audio-applications
IEEE Transactions on Circuits and Systems, 1989The design and implementation of a high-quality digital audio equalizer set composed of 10 equalizer sections with a worst-case overall signal-to-noise ratio greater than 90 dB, which is suitable for CD (compact-disc) applications is discussed. The implementation of the equalizer sections has been realized with wave digital filters.
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Multi-rate sampling digital audio equalizer
IEEE Proceedings of the SOUTHEASTCON '91, 2002The advantages of implementing a digital audio equalizer using multirate sampling techniques vs. fixed sampling are presented. A theoretical discussion of multirate sampling equalization design issues such as processor computational bandwidth, number of equalizer bands, frequency resolution in a particular band, and filter type and order are reviewed ...
J. Principe +3 more
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Optimal Design of Digital Audio Parametric Equalizer
Journal of Information and Computational Science, 2014The traditional design method of digital audio parametric equalizer often has spectrum aliasing between two adjacent sub-filters with closed center frequencies. A modified design method for digital parametric equalizer is proposed in this paper. A computer-aided design method is adopted to approach the desired amplitude-frequency responses based on ...
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Digital equalization for audio with application to loudspeakers and rooms.
2009The application of a non-minimum-phase digital filterbank as graphic equalizer is investigated. The filterbank effected a timbral modification of some musical signals even though the magnitude response was unity. For this reason, the filterbank was rejected as a candidate for a high-fidelity graphic equalizer.
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Design of Audio Parametric Equalizer Filters Directly in the Digital Domain
IEEE Transactions on Audio, Speech, and Language Processing, 2011Most design procedures for a digital parametric equalizer begin with analog design techniques, followed by applying the bilinear transform to an analog prototype. As an alternative, an approximation to the parametric equalizer is sometimes designed using pole-zero placement techniques.
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Evaluation and alternative regularization of audio equalization techniques
2013Inverse-filtering techniques are used in audio equalization of rooms and loudspeakers to correct or enhance the listening environment and to create virtual reality audio systems. The inverse-filtering concept is based on the concept that one can undo a system (loudspeaker, room, or some audio/acoustic path) completely or modify it to some desired ...
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