This study aimed to determine the pattern of intensity vector distribution of the midrange loudspeaker at frequency 3000 Hz and 6000 Hz. The 3000 Hz was selected because human ear was very sensitive to this frequency, whereas the frequency 6000 Hz was selected as an output limit of the midrange loudspeaker. The data were collected by using two condenser microphone that was connected by using a Spectra Plus 5.0 program to the computer. The data (voice) were taken at a distance of 1 meter from the center of the loudspeaker. The distance between the sample points was 10° for one position and there were 36 points for each frequency. At each sample point on a position, a second condenser microphones rotated by 36 points around the first condenser microphone. The second condenser microphones rotation interval was 10. At frequency 3000 Hz, the pattern of sound intensity vector distribution tended to spread over the front and the left side of loudspeaker. While at frequency 6000 Hz, the pattern of sound intensity vector distribution focused to the front of loudspeaker.
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机译：这项研究旨在确定中频扬声器在3000 Hz和6000 Hz频率下强度矢量分布的模式。选择3000 Hz是因为人耳对此频率非常敏感，而选择6000 Hz作为中音扬声器的输出极限。使用两个电容式麦克风收集数据，该麦克风通过使用Spectra Plus 5.0程序连接到计算机。数据（语音）是在距扬声器中心1米的距离处获取的。一个位置的采样点之间的距离为10°，每个频率有36个点。在一个位置的每个采样点，第二个电容式麦克风围绕第一个电容式麦克风旋转36个点。第二个电容式麦克风的旋转间隔为10。在频率3000 Hz时，声音强度矢量分布的模式倾向于散布在扬声器的正面和左侧。在频率为6000 Hz时，声音强度矢量分布的模式集中在扬声器的前部。
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