The AI-DI score for directional microphones is described as?

The AI-DI score for directional microphones is described as?

• A. It is the ratio front-to-all directions, weighted by articulation index
• B. It measures bone conduction offset
• C. It is unaffected by frequency
• D. It indicates the overall loudness of the output

Answer: (A)

The main idea is that the AI-DI score measures how much a directional microphone improves speech intelligibility by comparing the energy picked up from the front to the energy from all directions, with the frequencies weighted by how important they are for understanding speech. In other words, it’s a front-to-all-directions ratio where each frequency is weighted by the articulation index to reflect its contribution to intelligibility. This makes the AI-DI a measure of directional benefit, rather than bone conduction offsets, a frequency-invariant quantity, or overall output loudness.

The main idea is that the AI-DI score measures how much a directional microphone improves speech intelligibility by comparing the energy picked up from the front to the energy from all directions, with the frequencies weighted by how important they are for understanding speech. In other words, it’s a front-to-all-directions ratio where each frequency is weighted by the articulation index to reflect its contribution to intelligibility. This makes the AI-DI a measure of directional benefit, rather than bone conduction offsets, a frequency-invariant quantity, or overall output loudness.