>> No.  Anyway sound goes through solid things as well as air so even if it 
>> couldn't go through the gap it would go through the wall itself.
>
> OK... but presumably the velocity of sound inside a brick wall is 
> different to free air, so there would be some kind of diffraction effect?

Probably, along with all the echo paths and different attenuation amounts of 
different materials at different frequencies it probably explains why music 
sounds horrible from the next room :-)

Post a reply to this message