Can normal microphones record high frequency content?
Recently I saw someone advertising a microphone as having a “Extended frequency range capable of recording ultrasonic content” but that made me wonder what that really means. When I’ve recorded at a sample rate of 192khz with my AT897 I’ve seen frequencies as high as 30k coming from my own voice.
So can “normal range” microphones record ultrasonic content if the sample rate is high enough or is something else going on. what does it mean to have extended frequency range, wouldn’t that be fully handled by the sample rate of interface?
I figured I’d ask here because I feel like I’m missing something, as I was under the impression that any microphone could record ultrasonic content with the right interface.
But at the same time i often see frequency ranges on microphones like 20hz-20khz on my At897 shotgun mic or 40hz-15khz on my sm57. How do those numbers factor into the eqaution, is the microphone just less sensitive to anything above or below, But can still pick it up, or would it not be picked up at all?
Thanks for reading, and I appreciate any help. I find myself very interested in ultrasonic content for sound design, as I’ve been getting into recording at high frequencies and slowing down the recording to maintain detail at slow speeds.