Before you haul the leaf blower out to your ready and waiting leaves, first read the manual so you can understand how to best control the air flow and power. No need to operate at full throttle when a low setting will do. This will also reduce the noise emissions. There are actually nozzle attachments that can also muzzle the sound.
Also make sure you do periodic checks on the machine's muffler, filter and intakes. Significant clogging can severely hamper effectiveness.