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编辑同志: 我读了《电子技术》1980年第3期赵其昌同志的《声波的辐射与纸盆扬声器》一文后很有收获,但对该文有些地方还不够理解,现在将问题分列如下,烦请作者逐一给予解答。 1.式(2)里声质量中的0.6a_t与0.85a_t为何不合并成1.45a_t,它们分别说明什么? 2.扬声器有一定的谐振频率范围或上下限,究竟是取其上限还是下限为好?例如YD3-2001型的谐振频率为80_(-25)~(+10)是取80,还是取90或55为好?为什么? 3.扬声器有效半径a取标称半径的多少?取大取小有何影响? 4.一般取倒相孔的面积为扬声器有效面积的0.5～1.0倍,为什么?取大取小有何影响?
Editor’s Comrade: I read the article entitled “Electronic Technology”, No. 3, 1980, by Comrade Zhao Qichang’s article entitled “Radiation and cone Speakers of Acoustic Waves”, but there are still some areas where the article is not yet understood enough. Now, Please help the authors to answer one by one. 1) (2) where the sound quality of 0.6a_t and 0.85a_t why not merge into 1.45a_t, which respectively explain what? 2 speakers have a certain resonant frequency range or upper and lower limits, whether it is from the upper limit or lower limit is good For example, the resonance frequency of YD3-2001 type is 80 _ (- 25) ~ (+10) is to take 80, or take 90 or 55 is good? Why? 3. The effective radius of the speaker a take the nominal radius of how much? What is the impact of small? 4. In general take the area of the inverse aperture of the effective area of the speaker 0.5 to 1.0 times, why?