摘要:
A device is arranged for producing a driving signal (VM) for a transducer (7), such as a loudspeaker. The driving signal has a frequency substantially equal to a resonance frequency of the transducer and an amplitude controlled by an external signal (VE). The device is arranged for automatically adjusting the frequency of the driving signal to the resonance frequency of the transducer, using a control path (8). The device may be part of a frequency adaptation device (1) for adapting a frequency range of an audio signal to the transducer (7).
摘要翻译:一种装置被布置用于产生用于诸如扬声器的换能器(7)的驱动信号(V SUB M)。 驱动信号的频率基本上等于换能器的谐振频率和由外部信号(V SUB)控制的振幅。 该装置用于使用控制路径(8)自动调节驱动信号的频率与换能器的共振频率。 该装置可以是用于使音频信号的频率范围适配到换能器(7)的频率适配装置(1)的一部分。
摘要:
An audio signal may be enhanced by adding enhancement signals, such as harmonics and/or sub-harmonics of the signal's bass components. To avoid any unwanted enhancement signals during soft passages or speech, it is proposed to monitor the audio signal for tonal signal components in a frequency range and to only add the enhancement signals if such tonal signals are detected. A tonal detector (3) may comprise sine and cosine generators whose frequency is preferably equal to a dominant frequency of the frequency range.
摘要:
An audio system includes a circuit (12) for processing an audio signal, which circuit (12) having an input (20) for receiving the audio signal and an output (26) for supplying an output signal. The circuit (12) further includes a harmonics generator (22) coupled to the input (20) for generating harmonics of the audio signal and an adding circuit (24) coupled to the input (20) as well as to the harmonics generator (22) for supplying a sum of the audio signal and the generated harmonics to the output (26). The harmonics generator (22) includes an integrator (34) for integrating the audio signal and, coupled thereto, a resetting circuit (36) for resetting the integrator (34) at resetting times.
摘要:
An enclosure (1) for an acoustic transducer (2) comprises a first chamber (11) for accommodating the acoustic transducer (2) and a spaced apart second chamber (12), which first and second chambers are acoustically coupled by a coupling section (15). The coupling section may have a smaller diameter than the first and the second chamber. An optional further coupling section (16) may acoustically couple the first chamber (11) to an optional third chamber (13). The volume of the enclosure is distributed over the various chambers, thus providing a relatively large enclosure, even when the first chamber (11) is small. Any non-fundamental resonances induced by the coupling sections (15, 16) lie outside the active region of the transducer (2).
摘要:
A transducer (1) for producing sound in response to an electrical signal comprises an actuator (2) with a magnet (4) and a coil (5), and a vibration surface (3), for example a loudspeaker cone. The actuator and the vibration surface are mechanically coupled. The transducer (1) is designed to operate at substantially its resonance frequency (f0). This results in a very high transducer efficiency, which is particularly relevant for rendering low audio frequencies.
摘要:
In a touch sensor the change in electrical characteristics (impedance, piezo-voltage) of spacing elements (13,14,15,25), provided with an conducting, resistive or piezo-electric layer (15, 25), are measured to determine the sensing area.
摘要:
Disclosed is a method of encoding a multichannel signal including at least a first signal component (y) and a second signal component (r). The method comprises the steps of determining a set of filter parameters (Fp) of a prediction filter (201) such that the prediction filter provides an estimate (P) of the second signal component when receiving the first signal component as an input; and representing the multichannel signal as the first signal component and the set of filter parameters. Further disclosed are a corresponding arrangement for encoding a multichannel signals and a corresponding method and arrangement for decoding such a signal.
摘要:
A shuffle device (5) for players with different types of storage medium such as CD (1), DVD (2), hard disk drive (3) or random access memory (4). The shuffle device (5) is provided in a particular central control device (7) such as a remote control, a hand-held computer, a personal digital assistant or palmtop that is valuable for all the players of the (home) system. As the shuffle device (5) comprising hardware and software is needed only once and can be used for different players, the cost of each player is reduced. Meta data that are downloaded from the Internet, derived from a smart card, added by means of a voice-to-text-converter or typed in by the user can be displayed on the central control system (7).
摘要:
An apparatus (100) for processing reproducible data comprises a receiving unit (103) adapted to receive reproducible data in a given order, and a processing unit (104) adapted to generate altered reproducible data by altering at least one property of received reproducible data in an at least partially random manner, wherein the alteration of at least one property is perceivable by a human sense when the altered reproducible data are reproduced in the given order.
摘要:
A panel-shaped acoustic wave generator (1A; 1B; 101) comprises one or more planar plates (2,3;102,103). In an embodiment two planar plates (2, 3; 102, 103) are arranged substantially parallel at a distance (D) from each other, while the wave generator (1A;1B;101) further includes an acoustic transducer unit (4; 110A) for causing at least one of the plates to vibrate and a motional feedback unit (10; 110B). The motional feedback unit (10; 110B) comprise an integrated motion sensor (9) which comprises a first sensor component (11; 111B) mechanically coupled to a first plate (2; 102) and a second sensor component (12; 112B) mechanically coupled to a second plate (3; 103). In a specific embodiment, the wave generator is implemented as a display device (100) wherein the feedback means comprise at least one display cell (110B) of the display device.