JP-7856791-B2 - Directional sound generation device

JP7856791B2JP 7856791 B2JP7856791 B2JP 7856791B2JP-7856791-B2

Inventors

ガイ・トリオ
エドワード・マニエット

Assignees

ボーズ・コーポレーション

Dates

Publication Date: 20260511
Application Date: 20230512
Priority Date: 20220512

Claims (20)

It is a sound generating device, A housing having a front and upper section, A first electroacoustic transducer facing the front of the housing, A second electroacoustic transducer facing the upper part of the housing, A third electroacoustic transducer facing the upper part of the housing, At least one processor, The system includes, and the at least one processor, during audio playback, A first array is generated using the first electroacoustic transducer and the second electroacoustic transducer, the first array providing the left height component of the audio playback. A second array is generated using the first electroacoustic transducer and the third electroacoustic transducer, the second array providing the right height component for the audio playback. The main radial axis of the left height component generally aligns with a line crossing the first electroacoustic transducer and the second electroacoustic transducer, and/or the main radial axis of the right height component generally aligns with a line crossing the first electroacoustic transducer and the third electroacoustic transducer. A sound-generating device configured in such a way.
The sound generating device according to claim 1, wherein the first electroacoustic transducer is positioned between the second electroacoustic transducer and the third electroacoustic transducer.
The sound generating device according to claim 1, wherein the front and upper parts of the housing are perpendicular to each other.
The sound generating device according to claim 1, wherein all of the electroacoustic transducers used to generate the first array receive the same audio source signal, and all of the electroacoustic transducers used to generate the second array receive the same audio source signal.
The sound generating device according to claim 4, wherein each of the first and second arrays comprises an array filter applied to the audio source signal for each of the electroacoustic transducers in each array.
The sound generating device according to claim 5, wherein the array filter for the second electroacoustic transducer and the third electroacoustic transducer comprises a broadband filter.
The sound generating device according to claim 5, wherein the array filter for the first electroacoustic transducer rolls off above a predetermined frequency.
The sound generating device according to claim 5, wherein the array filter for the first electroacoustic transducer comprises a bandpass filter.
The sound generating device according to claim 8, wherein the bandpass filter has a low-frequency threshold of approximately 600 Hz and a high-frequency cutoff of approximately 2 kHz.
The sound generating device according to claim 5, wherein all of the array filters are non-minimum phase filters.
The sound generating device according to claim 1, wherein the first array and the second array are applied only across the array frequency range.
The sound generating device according to claim 11, wherein the array frequency range is approximately 600 Hz to approximately 6 kHz.
The sound generating device according to claim 1, wherein the first electroacoustic transducer has a bandwidth of approximately 600 Hz to approximately 18 kHz.
The housing has a left end and a right end, The device further comprises a fourth electroacoustic transducer facing the left end of the housing and a fifth electroacoustic transducer facing the right end of the housing. The processor is further configured to generate a third array using the first electroacoustic transducer, the second electroacoustic transducer, the third electroacoustic transducer, the fourth electroacoustic transducer, and the fifth electroacoustic transducer during audio playback. The third array provides the left component for the audio playback, The processor is further configured to generate a fourth array using the first electroacoustic transducer, the second electroacoustic transducer, the third electroacoustic transducer, the fourth electroacoustic transducer, and the fifth electroacoustic transducer during audio playback. The sound generating device according to claim 1, wherein the fourth array provides the right component for audio playback.
The sound generating device according to claim 14, wherein the processor is further configured to generate a fifth array using the first electroacoustic transducer, the second electroacoustic transducer, the third electroacoustic transducer, the fourth electroacoustic transducer, and the fifth electroacoustic transducer during audio playback, the fifth array providing a central component for the audio playback.
The sound generating device according to claim 15, wherein the processor is further configured to generate a sixth array based on a combination of the first array and the third array during audio playback, the sixth array providing the left surround component of the audio playback, and the processor is further configured to generate a seventh array based on a combination of the second array and the fourth array during audio playback, the seventh array providing the right surround component of the audio playback.
A computer program comprising encoded computer program instructions, wherein the computer program instructions, when executed by at least one processor on a sound generating device comprising a housing having a front and a top, a first electroacoustic transducer facing the front of the housing, a second electroacoustic transducer facing the top of the housing, and a third electroacoustic transducer facing the top of the housing, causes the sound generating device to perform audio playback. The first electroacoustic transducer and the second electroacoustic transducer are used to generate a first array, the first array providing the left height component of the audio playback, The first electroacoustic transducer and the third electroacoustic transducer are used to generate a second array, the second array providing the right height component for the audio playback. A computer program that causes the principal radial axis of the left height component to generally align with a line crossing the first electroacoustic transducer and the second electroacoustic transducer, and/or the principal radial axis of the right height component to generally align with a line crossing the first electroacoustic transducer and the third electroacoustic transducer.
The computer program according to claim 17, wherein the first electroacoustic transducer is positioned between the second electroacoustic transducer and the third electroacoustic transducer.
The computer program according to claim 17, wherein all of the electroacoustic transducers used to generate the first array receive the same audio source signal, and all of the electroacoustic transducers used to generate the second array receive the same audio source signal, and the first array and the second array each include an array filter applied to the audio source signal for each of the electroacoustic transducers in the respective array.
The computer program according to claim 19, wherein the array filter for the second electroacoustic transducer and the third electroacoustic transducer comprises a broadband filter, and the array filter for the first electroacoustic transducer comprises a bandpass filter.

Description

This disclosure relates to a sound-generating device. Object-based audio playback requires a height component to achieve the three-dimensional placement of acoustic objects. Audio devices and systems without overhead speakers are not natively configured to reproduce the height component of object-based audio. Various aspects of at least one example will be discussed below with reference to the accompanying drawings, which are not intended to be drawn to scale. These drawings are included to illustrate various aspects and examples and to provide further understanding, and are incorporated into and form part of this specification, but are not intended to define limitations of the invention. In the drawings, identical or nearly identical components illustrated in various drawings may be represented by similar letters or numbers. For clarity, not all components may be labeled in all drawings. In the drawings, This is a schematic diagram of sound generation devices in a listening space.This is a block diagram of a sound generation device.This is a block diagram of audio sources and filters for a loudspeaker array for a sound generating device.Includes the amplitude response of an exemplary filter for a loudspeaker in a height array of a sound-generating device.These are three-dimensional directivity representations for the left playback channel, left height playback channel, and center playback channel of an exemplary sound-generating device, respectively.These are three-dimensional directivity representations for the left playback channel, left height playback channel, and center playback channel of an exemplary sound-generating device, respectively.These are three-dimensional directivity representations for the left playback channel, left height playback channel, and center playback channel of an exemplary sound-generating device, respectively. DTS:X, an audio source for object-based audio such as Dolby Atmos, includes spatial metadata. To properly render object-based audio, the audio device(s) must have the ability to position sound in three-dimensional space. Audio devices such as soundbars, often used for audio in video applications, as well as conventional surround sound systems, are generally configured to produce horizontal sound that lies within a plane containing the expected listening position, and therefore cannot natively position sound in three-dimensional space. Consequently, such audio devices and systems cannot faithfully reproduce object-based audio. In some examples, the audio device is configured as a soundbar, with a generally rectangular prism-shaped enclosure that includes a front section generally facing the expected listening position in front of the television/monitor, an upward-facing (towards the room ceiling) top section, and left and right upward-facing top sections. In some examples, the central loudspeaker is located at the front, and the left and right upward-facing loudspeakers are located on the top surface of the enclosure, adjacent to the left and right of the central loudspeaker, respectively. Soundbars are designed to be positioned near a television or video monitor, usually directly below it. Soundbars often contain three to five loudspeakers, all substantially coplanar. To reproduce object-based audio, a soundbar needs to be configured to develop conventional horizontal surround acoustic channels (e.g., center, left, right, left surround, and right surround) and to develop left and right height components, but without loudspeakers positioned above the listener. In one example of this disclosure, the left height component is provided using a loudspeaker array including a center loudspeaker and an upward-facing left loudspeaker. In one example, the right height component is provided using a loudspeaker array including a center loudspeaker and an upward-facing right loudspeaker. The embodiments of the systems, methods, and apparatus described herein are not limited to those applicable to the configuration and arrangement details of the components described below or illustrated in the accompanying drawings. The systems, methods, and apparatus can be implemented in other embodiments and can be carried out or performed in various ways. Specific embodiments are provided herein for illustrative purposes only and are not intended to be limiting. Specifically, functions, components, elements, and features considered in relation to any one or more embodiments are not intended to be excluded from similar roles in any other embodiments. The examples disclosed herein can be combined with other examples in any manner consistent with at least one of the principles disclosed herein. Furthermore, references to “an example,” “some examples,” “an alternate example,” “various examples,” and “one example” are not necessarily exclusive to one another, and are intended to indicate that a particular feature, structure, or characteristic described may be included in at least one example. The appea