unidirectional microphone การใช้

Just because a movie was shot indoors doesn't mean it should sound as if it was recorded inside a clothes closet with a unidirectional microphone.
The most common unidirectional microphone is a cardioid microphone, so named because the sensitivity pattern is " heart-shaped ", i . e . a cardioid.
The curve for a standard cardioid microphone, the most common unidirectional microphone, can be represented as 0.5 + 0.5sin ( " ? " ) } } at its target design frequency.
Dean, who had been suffering with a severe bout of the flu for several days, attended a post-caucus rally for his volunteers at the Val-Air Ballroom in West Des Moines, Iowa and delivered his unidirectional microphone, leaving only his full-throated exhortations audible to the television viewers.