The properties of loudspeaker cone, such as dynamic Young¡¯s modulus, loss factor, acoustical velocity etc., are very important for a loudspeaker¡¯s cone. They are not only useful for designing and manufacturing loudspeaker system, but also helpful for choosing and optimization of raw materials in cone developing and quality control in cone making process. There are some limitations and errors in all the present methods for measurement of Young¡¯s Modulus and Loss Factor of speaker cone. These present methods can only measure a straight shape sample with equal thickness. Since the speaker cone may have a curved shape often with non-uniform thickness, they can not directly evaluate the actual cone. So it is necessary to develop an approach to more accurately characterize the cone¡¯s Young¡¯s modulus and loss factor.
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