> Much too loud for even a small number of people to use them without high noise pollution in any urban area.
Have you lived in a city before?
I go out to the street, and all I hear is cars passing by.
I go into my apartment, and I hear the drone of my A/C. When it shuts off, the drone of the exterior A/C of a nearby building starts up. Then one couple below me start yelling at each other. A dog starts barking across the street behind my house. A subway car rumbles by below me. Later, a freight train blares in the distance.
And you think a little "whrrrrr" above my building for 6 seconds is going to register??
I have lived in the Adams Point neighborhood in Oakland that has a population density of 32,000 per square mile for over a decade. This is about the same density as Brooklyn. It is right next to the I-580 (but is luckily below grade by this neighborhood), near the 980/24 freeway and 1/2 mile from downtown Oakland. No AC and no AC from my neighbors. I'm thankful for that as a few new buildings do have AC and walking by them is not very pleasant in an otherwise relaxing evening stroll.
I know many of my next door neighbors and luckily don't have any habitual yellers or badly trained dogs near to me. Early morning garbage trucks once a week and gardeners leaf blowing in front of leafless condos is the biggest noise problems. Cars are not so noisy as the narrow street keeps most people driving under 25 mpg. I can hear the freight trains as they pass through Jack London square, but that is a couple of miles away. Maybe I have just stumbled upon a high density urban setting that somehow is not so noisy compared to others. Have you walked around Paris? There are lots of quiet streets right in the middle of the city.
Maybe a million of these flying around the Bay would be fine and I'd love to see them work and then tested out for noise. I sure hope they are so quiet you would not notice them. Traffic congestion is making living in the Bay Area much more unpleasant than it could be.
Have you lived in a city before?
I go out to the street, and all I hear is cars passing by.
I go into my apartment, and I hear the drone of my A/C. When it shuts off, the drone of the exterior A/C of a nearby building starts up. Then one couple below me start yelling at each other. A dog starts barking across the street behind my house. A subway car rumbles by below me. Later, a freight train blares in the distance.
And you think a little "whrrrrr" above my building for 6 seconds is going to register??