Sensitive in only one axis. Having a cardioid or narrower type pattern. The most unidirectional would be a shotgun or parabolic microphone.
Telinga Microphones - Parabolic, Microphone, Stereo Parabolic, Bird Sounds, Nature Sounds, Nature Recording, Sound Recording, Distant Listening, Wildlife Listening, Bird Listening
Telinga Microphones - Parabolic, Microphone, Stereo Parabolic, Bird Sounds, Nature Sounds, Nature Recording, Sound Recording, Distant Listening, Wildlife Listening, Bird Listening
