[PJ-Comix]

Mics that are used to capture speaking or singing generally designed to suppress ambient noise. The further the source of noise is from the mic, the less likely the mic is to transfer that sound to the audio processing equipment.

In the Chicago riot police radio of the video posted by logi_cal869 above, the background sound is suppressed but you can still hear it. In the Capitol police video, the background noise is so absent you cant actually hear an echoing effect. Keep in mind that the Capitol police were up close to the supposed rioters.

[21twelve]

That’s the first thing I noticed was the echoing effect.

BTW - at 1:05 they needed to provide the actor with a script in a larger font.

[ScubaDiver]

Do have a specific time-stamp in the video? It’s 6-minutes long and comprised of scores of different clips.

When you’re watching the clips that were produced by body-cams, those clips were more likely to record richer ambient noise because that’s one of the design features of body cams. Body-cams are designed to record what’s going on around the wearer.

The audio clips probably were taken with varying two-way radios. The mics in com gear is less likely to pic up and transmit ambient noise because ambient noise is the enemy of clear communication.