Is there any way to send some sort of signal that will interfere with
You don't say whether they're playing radio, or a local music source
(e.g. CD or MP3).
Interfering with radio is possible. It's a bad idea, as (1) it's
illegal and you could face fines of many thousands of dollars and (2)
you could easily affect people other than the ones who are annoying you.
Interfering with CD or MP3 is also possible, but is vastly more
difficult. Doing it by direct emission of some form of
electromagnetic energy would require extremely high power levels.
Doing it with any form of homebuilt apparatus would, I suspect, put
you at serious personal risk of injury (electrocution, fire, metal
objects flying through the air, radiation-induced mutations which
result in the loss of all of your hair and do _not_ bestow any form of
super-powers, etc.) in addition to the legal problems previously
mentioned.
My advice is, don't try it. It's unlikely to succeed, and the
consequences of trying could be anywhere from annoying to extremely
unfortunate (death being among the latter).
Yes, it is called a telephone. Use it to call the police (try 911) and hold
it up to transmit the offending sound to the PD so that men with truncheons
and guns can raid the neighbors.
Well, I'd start off a _bit_ more gently than that... possibly a polite
letter to the neighbors, possibly a complaint filed with your city's
code enforcement division or neighborhood-arbitration service, etc.
Using '911' for non-emergency calls is usually frowned upon. There's
usually a better number (sometimes 311, sometimes direct-dial) for
filing a non-emergency complaint. You _do_ have a valid reason to
complain, I think - cities generally have laws against disturbing the
peace or creating a noise nuisance in a residential neighborhood.
A few years ago my wife and I were renting a home near here. Tenants
of a house across the street had a habit of holding very loud parties
on weekends. We, and several other neighbors ended up reporting this
to the police (non-emergency) and on a couple of occasions the police
showed up to tell them to turn it down. Finally, one weekend, we saw
people starting to arrive for another of the same, called it in, and
two police cars arrived about a minute after the music started to
blare... and apparently ordered the tenants to cease-and-desist
immediately. The party never got started, and they never tried
another.
So, it may take a few calls, on a few different nights... but if your
neighbors persist in creating a nuisance, and if they develop a
history of multiple offenses and complaints, your local government
ought to take effective action eventually.