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Acoustic device

專利號
US11159886B2
公開日期
2021-10-26
申請人
Sony Corporation（JP Tokyo）
發(fā)明人
Shigetoshi Hayashi; Ryutaro Watanabe; Tetsunori Itabashi; Toru Nakagawa; Takuma Domae
IPC分類
H04R5/02; H04R1/02
技術領域
ear,speaker,11rp,11lp,speakers,signal,11ls,11rs,acoustic,right
地域： Tokyo

摘要

To favorably reduce crosstalk components output from respective speakers that reproduce left and right ear signals.Directivity is given to a left ear signal and a right ear signal and the left ear signal and the right ear signal are reproduced by using at least two respective speakers arranged back-to-back to reduce crosstalk components. For example, the speaker may be a speaker installed in a headrest or a seat provided with the headrest. For example, the directivity given to the left ear signal and the directivity given to the right ear signal may be bidirectional directivity or unidirectional directivity.

說明書

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the benefit under 35 U.S.C. § 371 as a U.S. National Stage Entry of International Application No. PCT/JP2019/000602, filed in the Japanese Patent Office as a Receiving office on Jan. 10, 2019, which claims priority to Japanese Patent Application Number JP2018-003187, filed in the Japanese Patent Office on Jan. 12, 2018, each of which is hereby incorporated by reference in its entirety.

TECHNICAL FIELD

The present technology relates to acoustic devices. In particular, the present technology relates to an acoustic device that reduces crosstalk components output from respective speakers for reproducing left and right ear signals.

BACKGROUND ART

Stereophonic reproduction systems (virtual surround systems) using headrest speakers have been conventionally proposed. Such a stereophonic reproduction system achieves virtual surround by using two headrest speakers including a left headrest speaker and a right headrest speaker. To achieve such a stereophonic reproduction system, it is necessary to reduce crosstalk components.

For example, Patent Literature 1 proposes a loudspeaker system that uses a speaker array to reproduce a user-specific audio signal for each seat. The technology proposed by Patent Literature 1 allows different users to hear different audio signals by using directivity formed through signal processing performed on the speaker array. However, the loudspeaker array is necessary for this technology and this technology is subject to restriction of position in such a manner that the speaker array should be arranged between at least two of listening positions.

CITATION LIST

權利要求

1
The invention claimed is:1. An acoustic device that gives directivity to each of a left ear signal and a right ear signal and reproduces each of the left ear signal and the right ear signal by using at least two respective speakers arranged back-to-back to reduce a crosstalk component, whereinthe two speakers arranged back-to-back include a primary speaker and a secondary speaker for forming directivity,a primary speaker for reproducing the left ear signal and a primary speaker for reproducing the right ear signal are arranged at a predetermined interval in a first direction,a secondary speaker for reproducing the left ear signal is arranged at a position closer to the primary speaker for reproducing the right ear signal than the primary speaker for reproducing the left ear signal in the first direction, anda secondary speaker for reproducing the right ear signal is arranged at a position closer to the primary speaker for reproducing the left ear signal than the primary speaker for reproducing the right ear signal in the first direction.2. The acoustic device according to claim 1, wherein a speaker of the two speakers is installed in a headrest or a seat provided with the headrest.3. The acoustic device according to claim 1,wherein the directivity given to the left ear signal and the directivity given to the right ear signal are bidirectional directivity.4. The acoustic device according to claim 1,wherein the directivity given to the left ear signal and the directivity given to the right ear signal are unidirectional directivity.5. An acoustic device that gives directivity to each of a left ear signal and a right ear signal and reproduces each of the left ear signal and the right ear signal by using at least two respective speakers arranged back-to-back to reduce a crosstalk component, whereinthe two speakers arranged back-to-back include a primary speaker and a secondary speaker for forming directivity,a primary speaker for reproducing the left ear signal and a primary speaker for reproducing the right ear signal are arranged at a predetermined interval in a first direction, anda single secondary speaker for reproducing the left ear signal and the right ear signal is arranged at a position between the primary speaker for reproducing the left ear signal and the primary speaker for reproducing the right ear signal.6. An acoustic device that gives directivity to each of a left ear signal and a right ear signal and reproduces each of the left ear signal and the right ear signal by using at least two respective speakers arranged back-to-back to reduce a crosstalk component, whereinthe two speakers arranged back-to-back include a primary speaker and a secondary speaker for forming directivity,a primary speaker for reproducing the left ear signal and a primary speaker for reproducing the right ear signal are arranged at a predetermined interval in a first direction,a secondary speaker for reproducing the left ear signal is arranged at the same position as the primary speaker for reproducing the right ear signal in the first direction, anda secondary speaker for reproducing the right ear signal is arranged at the same position as the primary speaker for reproducing the left ear signal in the first direction.7. An acoustic device that gives directivity to each of a left ear signal and a right ear signal and reproduces each of the left ear signal and the right ear signal by using at least two respective speakers arranged back-to-back to reduce a crosstalk component, whereinthe two speakers arranged back-to-back include a primary speaker and a secondary speaker for forming directivity,a primary speaker for reproducing the left ear signal and a primary speaker for reproducing the right ear signal are arranged at a predetermined interval in a first direction,a first secondary speaker is arranged at the same position as the primary speaker for reproducing the left ear signal in the first direction and a second secondary speaker is arranged at the same position as the primary speaker for reproducing the right ear signal in the first direction,the first secondary speaker is used as a secondary speaker for middle and high frequencies of the left ear reproduction signal and a secondary speaker for a low frequency of the right ear reproduction signal, andthe second secondary speaker is used as a secondary speaker for middle and high frequencies of the right ear reproduction signal and a secondary speaker for a low frequency of the left ear reproduction signal.8. The acoustic device according to claim 7,wherein the secondary speaker for the middle and high frequencies forms unidirectional directivity or bidirectional directivity, and the secondary speaker for the low frequency forms bidirectional directivity.
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