SonexBuilders.net

I saw some mention of this some time back and don't remember a follow up. I have a app on my cell that measures noise level and I pulled it out and measured the level in my Onex with Aerovee cruising at 3000 rpm. It was a steady 79-80 dB. No insulation except for carpeting on the floor.

Thank you for sharing this data. It is actually lower than I expected. It'll be interesting to compare this to inside the electric (and belt reduced) Xenos once Gabe has a chance to record his levels. By the way, which app did you use to measure the levels?

Thanks,
Paul

I can't find a source for it. It's called Sound Meter and I think it came in a list of Tools.

It's pretty easy to find decibel meter aps for your phone but the one I tried peaked out at around 90dB. I checked noise levels using a dedicated meter, only a cheapie so who knows how accurate, and at cruise speed recorded noise levels a little over 100dB. https://www.sonexaus.org.au/galleries/building-tips/cockpit-noise/ 79 to 80dB is lower than I recorded at idle.

Peter

Remember that there is a distance component to dB measurements so comparing values is not necessarily useful unless we know where in the cockpit the meter was held, and whether it was mounted to any surface (which will add in vibration and conduction).

—Noel
(Who used to wrench on race car teams that knew when to briefly lift off the throttle at Laguna Seca, to avoid tripping the stringent noise limit sensors there) ;-)