Effect of Hybrid Alumina/Aluminium Foil Dome Diaphragms on Sound Performance of Loudspeaker

[摘要] Plasma electrolytic oxidation (PEO) technology enables to fabricate a nanostructured ceramic top layer on an aluminium foil, called hybrid alumina/aluminium material, which has the enhanced properties like hardness, stiffness, wear resistance and corrosion resistance. In this work, PEO nanostructured coatings were applied to aluminium speaker domes to study what effects PEO coatings could offer. A set of treated domes were processed to have a thin coating and the other processed to have a thicker coating. Afterwards, the speaker domes were conducted with several tests and measurements. From the frequency range of a low frequency (200 Hz to 5 kHz) there was very little downside to adding the coating, only at middle frequencies (5 kHz to 12 kHz) a slight decrease in sensitivity can be found. In high range frequencies (12 kHz to 14 kHz) the sensitivity in dampening and sound distortion resistance was increased. In general, these qualities should lead to a better, cleaner sound quality reproduction.

[发布机构] Department of Mechanical, Automotive and Materials Engineering, University of Windsor, Windsor; ON; N9B 3P4, Canada^1;College of Engineering, University of Michigan, Ann Arbor; MI; 48109-2102, United States^2;Radian Audio Engineering, ON, Canada^3

[关键词] Enhanced properties;Frequency ranges;Low-frequency;Nanostructured ceramic;Nanostructured coatings;Plasma electrolytic oxidation;Sound distortion;Sound Quality