<p>We have a friend who uses the Bose headphones when flying – only way he can sleep. Seems like I wouldn’t like that option if I were the neighbors, as it would interfere with things like conversation, TV, phone use, etc. And I hate to wear things on my head. (I pull my glasses off as soon as I’m out of the car.)</p>
<p>Have your neighbors actually complained, or are you just trying to be proactive? Here in Germany, when a neighbor doesn’t like something you are doing, they just sue you. 
They don’t even talk to you about it. You don’t know there was a problem until the police show up or you get a letter from their lawyer. It would be funny if it weren’t so sad. (We have been fortunate to have good neighbors here, though.)</p>
<p>Of course, there’s timing, too. If your son can avoid late-night practicing, (or baby nap-times), that might help. Practice when they’re at work, or out mowing the lawn.</p>