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Virtual surround for loudspeakers with increased constant directivity

一种扬声器、声道的技术，应用在用于具有增强的恒定方向性的扬声器的虚拟环绕领域

Active Publication Date: 2011-09-21
LOGITECH EURO SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since higher frequencies have smaller wavelengths, higher frequencies can be difficult to achieve properly with dipole beamforming arrays, and it is not always possible for an optimal dipole beamforming system to be physically Place tweeters (or other transducers) close enough together

Method used

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  • Virtual surround for loudspeakers with increased constant directivity
  • Virtual surround for loudspeakers with increased constant directivity
  • Virtual surround for loudspeakers with increased constant directivity

Examples

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Embodiment Construction

[0034] Various embodiments use a combination of different methods for creating virtual surrounds. Some of the methods used in various embodiments include: dipole beamforming, multi-level arrays, transducer orientation, and housing shadowing. In general, each of these methods may function in a particular frequency band in various embodiments. Using multiple methods for creating virtual sound can enhance virtual sound effects and maintain sound quality better than using a single method for creating virtual surround. Each method for creating a virtual surround can be optimized for a particular system configuration based on factors such as the physical location of the transducers, the directionality of the transducers, the size and shape of the enclosure, and the input signal configuration. Various embodiments allow intensity differences to be produced for the listener over a wide frequency range in order to produce constant directivity.

[0035] As used herein, a "transducer" m...

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Abstract

The invention discloses virtual surround for loudspeakers with increased constant directivity. A speaker system includes a first array of transducers in a speaker enclosure and, and at least a second array of transducers in the speaker enclosure. The second array is a low-frequency array and the first array is a high-frequency array. The transducers in the first array are configured to have an operating frequency region covering at least the frequency ranges of the first array and the second array, and the transducers in the second are configured to have an operating frequency region covering at least the frequency ranges of the first array and the second array. The speaker system further includes an input port, and a controller operatively coupled with the input port. The controller is configured to provide an electronic-audio signal to the transducers such that the first array and the second array are tuned to different center frequencies and are a two stage dipole beamforming array.

Description

[0001] Cross References to Related Applications [0002] This application is US Patent Application No. 12 to Jason Riggs et al., filed March 4, 2010, entitled "VIRTUAL SORROUND FOR LOUDSPEAKERS WITH INCREASED CONSTANT DIRECTIVITY" / 717,781, the contents of which are hereby incorporated by reference for all purposes. Background technique [0003] In a traditional surround sound system, the listener places five or more speakers at various locations around the listening position (sometimes called the listening zone) to create an immersive sound experience for the listener. Each speaker in the system typically receives its own audio signal from the audio source, so the listener typically must wire each speaker to the audio source. Thus, the speakers in the audio system produce sound that is focused at the listening position to properly create a surround sound experience for the listener. [0004] Virtual surround is a surround sound technology that can make sound appear to come ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R1/32
CPCH04R5/02H04R1/403H04R1/26H04R3/12H04R2201/401H04R2203/12H04R1/24H04R2205/022H04R2201/403H04R3/14
Inventor 贾森·里格斯贾森·N·林瑟胡荣乔伊·E·莱昂斯
Owner LOGITECH EURO SA
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