Which AI-DI value is considered best for a directional microphone performing in noise?

Which AI-DI value is considered best for a directional microphone performing in noise?

• A. -5 dB
• B. -3 dB
• C. 0 dB
• D. 5 dB

Answer: (D)

AI-DI shows how directional a microphone is and how well it suppresses sounds from directions other than the front. In noise, you want the strongest directional effect to maximize noise rejection and improve the signal-to-noise ratio for the desired speech source. The larger the AI-DI, the more the microphone attenuates off-axis noise. Among the options, 5 dB is the highest value, meaning the greatest directivity and best performance in noise. Negative or zero values indicate less or no directional advantage, so they’re less effective in noisy situations.

AI-DI shows how directional a microphone is and how well it suppresses sounds from directions other than the front. In noise, you want the strongest directional effect to maximize noise rejection and improve the signal-to-noise ratio for the desired speech source. The larger the AI-DI, the more the microphone attenuates off-axis noise. Among the options, 5 dB is the highest value, meaning the greatest directivity and best performance in noise. Negative or zero values indicate less or no directional advantage, so they’re less effective in noisy situations.