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Yeah I tend to wear headphones but my dad will be doing bits alongside me on this job and it drives him mad so we have to listen to Smooth radio.
My other option for joist notching is a Worx-type saw with a 115mm blade but concerned it might end up feeling gutless on 7x3 timber. Plus it’s a one trick pony in that I doubt it’s great for cutting 8x4 sheets.
https://www.toolstation.com/dewalt-dcs571n-xj-18v-xr-brushless-compact-circular-saw/p70694
We use them a lot, most of the time I’m using it to notch out a small number of joists. If I had a lot I’d get the circular out.
Noise wise, I find the drills and them all defending, I mostly wear Bose qc headphones so they take the high end out which is good!