Play the same sounds that are in the Sound School For Dogs app. Tap a sound to play it, tap again to stop. Use the playlist button to build a playlist that plays your sounds one after another.
Only begin when your dog is calm and relaxed.
Preview sounds on headphones, or with the dog out of the room, before training.
If your dog shows any concern the sound is too loud. Lower the volume.
After 3-4 calm sessions, increase the volume a little and begin again.
Frequent sessions of 15-20 minutes beat long, infrequent ones.

Car alarms, door bells, whistles, etc · 14 tracks

Dogs, Cats, Birds, etc · 16 tracks

9 tracks

Bangs, fizzes, etc · 10 tracks

Sounds from around the house and garden · 10 tracks

Sounds made by People · 5 tracks

5 tracks

Rain · 7 tracks

Garbage Trucks, Vans, Cars, etc · 16 tracks