AVIXA Recognized AV Technologist Test

The frequency response specification of a microphone defines what?

1. The relative electrical output level over an audible frequency spectrum

2. A two-dimensional graph of spectrum vs. frequency

3. The highest frequency a microphone can transduce

4. The lowest frequency a microphone can transduce

The correct answer is: The relative electrical output level over an audible frequency spectrum

The frequency response specification of a microphone defines the relative electrical output level over an audible frequency spectrum. This specification is crucial because it illustrates how a microphone reacts to different frequencies within the typical range of human hearing, which is generally from 20 Hz to 20 kHz. When assessing a microphone's frequency response, it shows whether certain frequencies are amplified or attenuated, which impacts the overall sound quality captured by the microphone. For instance, a microphone with a flat frequency response will provide an even output across all frequencies, preserving the natural sound of the audio source without coloration. In contrast, if certain frequencies are boosted or cut, this will alter the character of the recorded sound, which is essential to consider when selecting a microphone for specific tasks or environments. The other options provide specific aspects of a microphone's capabilities but do not encapsulate the broader definition provided in the correct answer. While a graph might illustrate a microphone's frequency response, it does not define it. Similarly, stating the highest or lowest frequency transduced touches on specific endpoints but does not reflect the entire response across the frequency spectrum.