Out of curiousity, I'm interested in knowing if it's possible for a mic to 'focus' on sounds created within a certain distance range from the capsule... like 0-3 inches for cellphone mics, 50-75 feet for shotgun micing an orchestra but rejecting ambience and crowd noise (but shooting right THROUGH the crowd)... you get the idea.
is it physically possible to design a mic like this? the only way i could imagine it's possible is by somehow calculating the amount of time the sound is taking to arrive at the mic, by frequency-dependant phase variations or something (don't low frequency waves behave differently over time and space than high-frequency ones?) i don't really know... any thoughts?
is it physically possible to design a mic like this? the only way i could imagine it's possible is by somehow calculating the amount of time the sound is taking to arrive at the mic, by frequency-dependant phase variations or something (don't low frequency waves behave differently over time and space than high-frequency ones?) i don't really know... any thoughts?