Interpret Spectrogram

I would just like a little help understanding what this horizontal dead space just above and below 6k might indicate.

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Total destructive interference at those particular frequencies.

The amplitude, phase and frequency of the sound waves are such that there is complete cancellation at those frequencies.

A typical cause is sound reflecting from a surface (wall, desk, screen).

[ It can also be inherent to a microphone because of its design: independent of the microphones location in the room ].

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Thank you very much!

Happy Thanksgiving

The mic is a Shure SM7B. Does anyone know if this dead zone (just above and below 6k) is a property of the mic?

Just trying to troubleshoot with my meager understanding and setup.

This is what Shure says about their SM7B …


between ~6.5kHz & ~7.5kHz there is a 5dB dip.

It’s more than a 5-6dB dip.

What are you recording? It might be a true representation of the sound.

It doesn’t look like “trouble” to me. I doubt it’s audible.