标题：AES中相位塞设计文献

1楼

clkg66 发表于：2011-8-22 16:11:55

大侠请帮忙

哪位大侠是AES会员，不知能否帮忙下载两篇论文，是关于相位塞设计的！

123th 会议的：A New Methodology for the Acoustic Design of Compression Driver Phase-Plugs with Concentric Annular Channels

125th 会议的：A New Methodology for the Acoustic Design of Compression Driver Phase-Plugs with Concentric Radial Channels

感谢！

邮箱：clkg66@sohu.com

2楼

新绿发表于：2011-9-14 15:17:47

AES E-Library

New Methodology for the Acoustic Design of Compression Driver Phase Plugs with Concentric Annular Channels

Compression drivers couple a radiating diaphragm to a horn throat of smaller area, resulting in high efficiency. Commonly a phase plug is used to control the transition from diaphragm to horn in order to improve the high-frequency performance. In this paper a new design method for the positioning of annular phase plug channels is presented in order to improve the driver response.

Authors: Dodd, Mark; Oclee-Brown, Jack
Affiliation: GP Acoustics ( UK ) Ltd., Maidstone, UK
JAES Volume 57 Issue 10 pp. 771-787; October 2009 Import into BibTeX

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3楼

新绿发表于：2011-9-14 15:20:26

似乎DODD在深圳IEAT会议上发表过论文，可惜他使用的有限元软件很贵，国内也买不到。

4楼

水仙发表于：2011-9-14 15:40:43

In compression drivers a large membrane is coupled to a small horn throat resulting in high efficiency. For this efficiency to be maintained to high frequencies the volume of the resulting cavity, between horn and membrane, must be kept small. Early workers devised a phase-plug to fill most of the cavity volume and connect membrane to horn throat with concentric annular channels of equal length to avoid destructive interference [Wente us2037187].
Later work, representing the cavity as a flat disc, describes a method for calculating the positions and areas of these annular channels where they exit the cavity, giving least modal excitation, thus avoiding undesirable response irregularities [smith 1953].
In this paper the result of applying both the equal path-length and modal approaches to a phase-plug with concentric annular channels coupled to a cavity shaped as a flat disc is further explored. The assumption that the cavity may be represented as a flat disc is investigated by comparing its behavior to that of an axially vibrating rigid spherical cap radiating into a curved cavity.
It is demonstrated that channel arrangements derived for a flat disc are not optimum for use in a typical compression driver with a curved cavity.
A new methodology for calculating the channel positions and areas giving least modal excitation is described. The impact of the new approach will be illustrated with a practical design.
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