The microphone placement in the conference room is usually divided into two types: desktop placement and microphone stand placement.
When placing the microphone on the table, pay attention to the intersection angle and distance between the speaker's lips and the microphone core, so that the central axis of the microphone core points to the speaker's lips. At this time, the frequency response characteristics of the microphone output are better; the lip is offset from the core. The farther the center axis is, the worse the frequency response characteristics, the more serious the treble damage, and the output voltage of the microphone will also decrease. Usually a cardioid microphone, the angle between the lip and the central axis of the core is in the range of 450.
When speaking in the conference room, in order to better improve the clarity of language expression, the microphone should be 20-30 centimeters away from the lips. If it is too close, it is easy to produce low-frequency accents and interfere with the clarity of the sound. Picking up too much refraction sound and reverberation sound is very easy to cause howling. At this time, if the mixer is pushed too low, the sound will not meet the requirements, the audience cannot hear the content of the speech, and it is very easy to whistle when pushed too much. Therefore, it is particularly important to place the microphone precisely at the speaking distance of possible speakers.
When there are many people speaking and many microphones need to be placed, the distance between the microphones should be more than 3 times the distance between the sound source and the conference microphone (that is, to the 3:1 standard) to reduce the position interference caused by the accumulation of data signals. Phenomenon.
When one person speaks and needs to use two or more conference microphones to complete the pickup (for example, for a report), place the two or more conference microphones as close as possible, and keep each conference microphone to the sound source (speaker's lips) The distance between them is as equal as possible to prevent the position interference phenomenon caused by the accumulation of data signals. At this time, pay special attention to the same position of the conference microphone. Taking two conference microphones as an example, if the sound of the two conference microphones is not as loud as that of one conference microphone, it means that the two conference microphones are out of phase. At this time, the position of one conference microphone needs to be adjusted. Usually, Next, the problem lies in the microphone line, just adjust the wiring of one conference microphone back.
When placing the microphone stand, since many microphone stands are tripods, after the conference microphone is installed, the center of gravity of the conference microphone should be projected on a certain foot. To prevent the microphone's center of gravity from falling outside the range of the support bracket.