No disturbance at the turning on of Wigton Christmas lights

I was stood outside the church whilst the bands were playing on the main stage round the corner and down the street. I could hardly hear them. In part this will be due to attenuation. It is hard to apply the inverse square law here because that implies a perfectly spherical dissipation of the energy. But what about diffraction? Let's say that the gap at the end of the High Street is 10 metres wide. Waves diffract well if their wavelength is the same as the width of the gap. Sound waves have a speed of 340 metres per second. Applying the equation: wave speed = frequency x wavelength gives frequency = 340/10 = 34 Hertz. The best diffracted wavelength is almost too low to hear. Our ears don't detect well at the extreme ends of the spectrum. The most irritating frequency is around 1000 Hertz. A gap to diffract that would be 34 cm across. This gap is too big. It was peaceful.