A teacher teaching a class requested to record the class using a pin microphone while keeping both hands free. He wanted to show the video to his students with the best possible sound quality, so we recommended the use of a head microphone.
Pin microphones worn around the collar have the disadvantage that the sound is muffled when the face is not facing the front, such as when writing on a whiteboard with a half-length of the body. On the other hand, a head microphone, which is also used by sports instructors, is fixed to the mouth, so the microphone can be used in class without concern for the direction of the face.
How to choose a microphone for recording a class
If you are teaching students in a classroom and want to record this with Zoom or similar, the easiest way is to use a speakerphone (360° omni-directional sound harvesting microphone). It picks up all the sounds in the classroom, so there are no mistakes.
On the other hand, for full-scale recording with emphasis on sound quality, it is recommended to use a hand or head microphone to record the voice from the mouth as it is. There are many points to note, such as the fact that speech without a microphone will not be recorded, and when playing audio material on a CD player, etc., it is necessary to set up the wiring so that the audio output of the player is mixed with the audio input of the recording in advance. However, the sound quality is incomparably higher than that of a speakerphone.
Decide whether ease of use or sound quality is more important, taking into consideration how you will use the recorded materials in the future.
Right: Compact head mic/pin mic set (for one person, but the receiver is also small and easy to use)