摘要:
A sound reproduction system has inputs (20, 21) for receiving audio signals (L, R). The received audio signals are split up into low-frequency audio signals (L1, R1) and high-frequency signals (Lh, Rh) by low-pass filters (23, 23a). Adjusting circuits (24, 24a) split up the high-frequency audio signals (Lh, Rh) into first sub-signals (Lh1, Rh1) and second sub-signals (Lh2, Rh2) which have, in essence, the same frequency spectra. The signal strength ratios between the first and second sub-signals can be adjusted by the adjusting circuits (24, 24a). Signal combining means (25, 25a) combine the low-frequency audio signals (L1, R1) with the second sub-signals (Lh2, Rh2). The signals obtained from the combination are fed as loudspeaker signals (LA, RA) to loudspeakers installed at the rear, left and at the rear, right in a passenger's compartment of a motor car. The sub-signals (Lh1, Rh1) are fed to loudspeakers installed at the front, left and at the front, right in the passenger's compartment. The advantage of the sound reproduction system is that in the case where the loudspeakers installed at the rear are better capable of reproducing the bass tones than the loudspeakers installed at the front, the tone colour of the reproduced sound is not affected by a change of the adjustment of the signal strength ratio.
摘要:
Device and method for controlling reproduction of an audio signal (S A ), wherein the device is operated by means of an energy storage device (2), characterized in that - a normal mode (M N ) is deactivated and an energy saving mode (M S ) is activated, wherein an power consumption from the energy storage device (2) for reproduction of the audio signal (S A ) is reduced in the energy saving mode (M S ) as compared to the normal mode (M N ), - in the energy saving mode (M S ) a bass frequency component (B) of a frequency spectrum (X(f SA )) of the audio signal (S A ) is reduced and the audio signal (S A ) is output with reduced bass frequency component (B), - a charge state (C) of the energy storage device (2) is ascertained, and - the reduction in the bass frequency component (B) is controlled based on a decrease in the charge state (C) of the energy storage device (2).
摘要:
Device and method for controlling reproduction of an audio signal (S A ), wherein the device is operated by means of an energy storage device (2), characterized in that - a normal mode (M N ) is deactivated and an energy saving mode (M S ) is activated, wherein an power consumption from the energy storage device (2) for reproduction of the audio signal (S A ) is reduced in the energy saving mode (M S ) as compared to the normal mode (M N ), - in the energy saving mode (M S ) a bass frequency component (B) of a frequency spectrum (X(f SA )) of the audio signal (S A ) is reduced and the audio signal (S A ) is output with reduced bass frequency component (B), - a charge state (C) of the energy storage device (2) is ascertained, and - the reduction in the bass frequency component (B) is controlled based on a decrease in the charge state (C) of the energy storage device (2).
摘要:
An apparatus comprising: a processor and memory including computer program code, the memory and the computer program code configured to, with the processor, cause the apparatus to: display a user interface for an audio equalizer, the user interface comprising a predefined region associated with a particular category of audio equalization; detect the position of a user input within the predefined region; and control the relative amplitudes of one or more frequency bandwidths of an audio signal to be output based on the detected position within the predefined region to produce a specific audio output having audio characteristics associated with that particular audio equalization category.
摘要:
The present invention relates to apparatus for electroacoustic energy conversion and particularly to a conversion apparatus comprising a channel for an electrical signal to be converted, said channel comprising in series connection signal processing means for processing said electrical signal and having in sequence a power amplifier and an electroacoustic transducer means, such as a loudspeaker. In accordance with the teachings of the present invention an electroacoustic energy converter apparatus is provided which introduces emphasis in a signal frequency range from 50 kHz up, preferably directly before delivering the signal to the power amplifier stage.
摘要:
L'invention concerne les filtres accordés par commutation. Selon un mode de réalisation, le filtre comporte un filtre capacitif 30 et un filtre résonnant 38, 42, tous deux recevant un signal d'entrée à filtrer. Le filtre résonnant comporte un gyrator 42 dont la réponse en fréquence dépend des valeurs de paramètres de deux trajets de circuit. Des moyens de commutation 48, 50, 56, 70 sont prévus pour sélectionner les valeurs de ces paramètres dans chacun de ces trajets de circuit. Les signaux de sortie du gyrator42 et du filtre capacitif 38 sont combinés pour former la sortie du filtre. Application aux égaliseurs pour enregistreur à bande magnétique.
摘要:
Bei einer Schaltungsanordnung mit elektronisch steuerbarem Übertragungsverhalten, in der das Eingangssignal einem Verstärker mit steuerbarer Gegenkopplung zugeführt wird, dessen Ausgang eine Spannungsteileranordnung mit frequenzabhängigem Verhalten angeschlossen ist, die mit mehreren Abgriffen (9 bis 13, 31 bis 35) versehen ist, die über einen ersten elektronisch steuerbaren Umschalter (8) mit einem invertierenden Eingang des Verstärkers und über einen zweiten elektronisch steuerbaren Umschalter (30) mit dem Ausgang der Schaltung verbunden sind, ist zur Beeinflussung der Güte verschiedener erzeugbarer Filterkurven vorgesehen, daß die beiden Umschalter (8, 30) so gesteuert sind, daß für eine Anhebung des Eingangssignals in einem von dem frequenzabhängigen Spannungsteiler bestimmten Frequenzbereich der erste Umschalter (8) auf eine solche Position gesetzt wird, daß die Anhebung in der gewünschten Frequenzbereichsbreite erfolgt und daß die Position des zweiten Umschalters (30) so gewählt wird, daß die Anhebung in dem gewünschten Maß erfolgt, und daß für eine Absenkung des Eingangssignals in dem von dem frequenzabängigen Spannungsteiler bestimmten Frequenzbereich der zweite Umschalter (30) auf eine solche Position gesetzt wird, daß die Absenkung mit der gewünschten Frequenzbereichsbreite erfolgt, und daß der erste Umschalter auf eine solche Position gesetzt wird, daß die Absenkung in dem gewünschten Maße erfolgt.