Sound-field reproduction systems using fixed-directivity loudspeakers
Sound reproduction systems using open arrays of loudspeakers in rooms suffer from degradations due to room reflections. These reflections can be reduced using pre-compensation of the loudspeaker signals, but this requires calibration of the array in the room, and is processor-intensive. This paper e...
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| Veröffentlicht in: | The Journal of the Acoustical Society of America 2010-06, Vol.127 (6), p.3590-3601 |
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| container_title | The Journal of the Acoustical Society of America |
| container_volume | 127 |
| creator | Poletti, M. Fazi, F. M. Nelson, P. A. |
| description | Sound reproduction systems using open arrays of loudspeakers in rooms suffer from degradations due to room reflections. These reflections can be reduced using pre-compensation of the loudspeaker signals, but this requires calibration of the array in the room, and is processor-intensive. This paper examines 3D sound reproduction systems using spherical arrays of fixed-directivity loudspeakers which reduce the sound field radiated outside the array. A generalized form of the simple source formulation and a mode-matching solution are derived for the required loudspeaker weights. The exterior field is derived and expressions for the exterior power and direct to reverberant ratio are derived. The theoretical results and simulations confirm that minimum interference occurs for loudspeakers which have hyper-cardioid polar responses. |
| doi_str_mv | 10.1121/1.3409486 |
| format | Article |
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M.</creatorcontrib><creatorcontrib>Nelson, P. A.</creatorcontrib><title>Sound-field reproduction systems using fixed-directivity loudspeakers</title><title>The Journal of the Acoustical Society of America</title><addtitle>J Acoust Soc Am</addtitle><description>Sound reproduction systems using open arrays of loudspeakers in rooms suffer from degradations due to room reflections. These reflections can be reduced using pre-compensation of the loudspeaker signals, but this requires calibration of the array in the room, and is processor-intensive. This paper examines 3D sound reproduction systems using spherical arrays of fixed-directivity loudspeakers which reduce the sound field radiated outside the array. A generalized form of the simple source formulation and a mode-matching solution are derived for the required loudspeaker weights. The exterior field is derived and expressions for the exterior power and direct to reverberant ratio are derived. The theoretical results and simulations confirm that minimum interference occurs for loudspeakers which have hyper-cardioid polar responses.</description><subject>Acoustics</subject><subject>Arrays</subject><subject>Calibration</subject><subject>Exact sciences and technology</subject><subject>Exteriors</subject><subject>Fundamental areas of phenomenology (including applications)</subject><subject>Loudspeakers</subject><subject>Physics</subject><subject>Reflection</subject><subject>Simulation</subject><subject>Sound reproduction</subject><subject>Three dimensional</subject><subject>Transduction; acoustical devices for the generation and reproduction of sound</subject><issn>0001-4966</issn><issn>1520-8524</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><recordid>eNqF0c9LHDEUB_Agiq62B_-BMhcpHsa-TH5schFk0VYQPLQ9h2zyImlnZ9a8GXH_-47u2p6KpxDy4eXx_TJ2yuGC84Z_4RdCgpVG77EZVw3URjVyn80AgNfSan3Ejol-TVdlhD1kRw0oBY2yM3b9vR-7WKeMbawKrksfxzDkvqtoQwOuqBopdw9Vys8Y65gLTq9PedhUbT9GWqP_jYU-sIPkW8KPu_OE_by5_rH4Vt_df71dXN3VQQIfagVSSYEWGoMRE6CBwKNWuAST5h6Vx2CsD9okL3wSxgQ7LQx-CSCWPIgT9nk7d9rzcUQa3CpTwLb1HfYjubkSWktrm_elEEJqbeaTPN_KUHqigsmtS175snEc3Eu8jrtdvJP9tJs6LlcY_8q3PCdwtgOegm9T8V3I9M81VnIhzeQut45CHvxL3v__9bUh99qQe2tI_AFvd5es</recordid><startdate>20100601</startdate><enddate>20100601</enddate><creator>Poletti, M.</creator><creator>Fazi, F. 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A.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Sound-field reproduction systems using fixed-directivity loudspeakers</atitle><jtitle>The Journal of the Acoustical Society of America</jtitle><addtitle>J Acoust Soc Am</addtitle><date>2010-06-01</date><risdate>2010</risdate><volume>127</volume><issue>6</issue><spage>3590</spage><epage>3601</epage><pages>3590-3601</pages><issn>0001-4966</issn><eissn>1520-8524</eissn><coden>JASMAN</coden><abstract>Sound reproduction systems using open arrays of loudspeakers in rooms suffer from degradations due to room reflections. These reflections can be reduced using pre-compensation of the loudspeaker signals, but this requires calibration of the array in the room, and is processor-intensive. This paper examines 3D sound reproduction systems using spherical arrays of fixed-directivity loudspeakers which reduce the sound field radiated outside the array. 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| ispartof | The Journal of the Acoustical Society of America, 2010-06, Vol.127 (6), p.3590-3601 |
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| language | eng |
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| source | AIP Journals Complete; Alma/SFX Local Collection; AIP Acoustical Society of America |
| subjects | Acoustics Arrays Calibration Exact sciences and technology Exteriors Fundamental areas of phenomenology (including applications) Loudspeakers Physics Reflection Simulation Sound reproduction Three dimensional Transduction acoustical devices for the generation and reproduction of sound |
| title | Sound-field reproduction systems using fixed-directivity loudspeakers |
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