An omnidirectional microphone records sound from all directions. This means that the microphone is sensitive all around. You can use an omnidirectional microphone to conduct a conference call or record a podcast. In this setting, you record the sound of a group of speakers with a single USB microphone. You choose an omnidirectional tie clip microphone to keep your hands free while speaking. Do you want to record a video with professional sound? Go for a model with a hot shoe adapter, so you can attach the microphone to your camera.