主题：【分享】英国新型平板扬声器轻薄如纸

真是越来越新奇了！

发展很快哦

是否愚人节新闻？平板扬声器一般是压电的或磁致伸缩的，这种复合塑料的物理原理不清楚？

ScienceDaily (Apr. 1, 2009) — A groundbreaking new loudspeaker -- less than 0.25mm thick -- has been developed by University of Warwick engineers. It's flat, flexible, could be hung on a wall like a picture, and its particular method of sound generation could make public announcements in places like passenger terminals clearer, crisper, and easier to hear.

愚人节一般不会把科学上的东西来搞吧

原文由 zouhua1210 发表:
愚人节一般不会把科学上的东西来搞吧

N年以前的愚人节就有过“牛西红柿”的报道啊

鉴定属实:从物理原理上讲是一种静电扬声器.结构图贴不上

Electrostatic loudspeaker
The laminate comprises three layers, as shown in the diagram below. The sheet materials are bonded in the production process to maintain the active thickness over an area between the A5 and A3 paper sizes. Electrical contacts to the outer layers of the laminate allow a boosted audio signal to drive the laminate, reproducing sound.



All speakers operate on the principle an electrical signal is converted into sound using a mechanical device. A conventional cone speaker takes the electrical signal, which in turn generates a varying magnetic field, in turn vibrating a mechanical cone, so producing the sound. All these energy conversions lead to a very inefficient speaker.

FFL technology produces sound using a far more efficient process. We directly apply the electrical signal to the laminate, which vibrates in time with the electrical signal. The laminate is composed of two conducting surfaces, called Membranes, separated by an insulating layer. Hence an electric field (rather than a magnetic field) forms over the laminate. The design and construction of the laminate is unique and protected by the Intellectual Property of Warwick Audio.

FFL are driven over the entire surface area, providing a near linear response at sound pressure levels suitable for many applications. By closely controlling the separation of the membranes, we achieve reduced active drive voltages compared to ESL.

It is important to note that by significantly improving the electrical to audio efficiency, we have broken the conventional link between the power rating and the loudness of a speaker. The loudness of cone speakers is often linked to the electrical power consumption. This is not a relevant relationship for the FFL.

原文由 atlas 发表:
鉴定属实:从物理原理上讲是一种静电扬声器.结构图贴不上

Electrostatic loudspeaker
The laminate comprises three layers, as shown in the diagram below. The sheet materials are bonded in the production process to maintain the active thickness over an area between the A5 and A3 paper sizes. Electrical contacts to the outer layers of the laminate allow a boosted audio signal to drive the laminate, reproducing sound.



All speakers operate on the principle an electrical signal is converted into sound using a mechanical device. A conventional cone speaker takes the electrical signal, which in turn generates a varying magnetic field, in turn vibrating a mechanical cone, so producing the sound. All these energy conversions lead to a very inefficient speaker.

FFL technology produces sound using a far more efficient process. We directly apply the electrical signal to the laminate, which vibrates in time with the electrical signal. The laminate is composed of two conducting surfaces, called Membranes, separated by an insulating layer. Hence an electric field (rather than a magnetic field) forms over the laminate. The design and construction of the laminate is unique and protected by the Intellectual Property of Warwick Audio.

FFL are driven over the entire surface area, providing a near linear response at sound pressure levels suitable for many applications. By closely controlling the separation of the membranes, we achieve reduced active drive voltages compared to ESL.

It is important to note that by significantly improving the electrical to audio efficiency, we have broken the conventional link between the power rating and the loudness of a speaker. The loudness of cone speakers is often linked to the electrical power consumption. This is not a relevant relationship for the FFL.

学习了，谢谢

科技的发展真是日新月异啊