I wonder if anyone has considered reverberation in these measurements. It's going to make the noise louder than it would otherwise be. Basically, the loudness

I wonder if anyone has considered reverberation in these measurements. It's going to make the noise louder than it would otherwise be. Basically, the loudness of a sound hitting your ear is a combination of multiple factors: 1. How loud the sound source is. 2. How close your ear is to it. 3. How much it reverberates or dissipates. Imagine if a hand dryer were installed outdoors in an open field. Sound would emanate from the dryer, then wander off never to return. Now imagine a hand dryer in a room with carpet and some soft furniture like a couch. Sound would emanate from the dryer, and some of it would hit surfaces that absorb it. But some of the sound would also hit reflective surfaces like walls or glass, and that reflected sound could come back to your ear and increase the total noise level. Now consider what a bathroom is like. For ease of cleaning, it's entirely hard surfaces. Concrete, porcelain, tile, metal, etc. These absorb almost no sound. And bathrooms are typically pretty small rooms. It's basically the worst case for taking an already-loud thing and making nearly all the noise reach your ear.