MP3 Stereo recording approximately 1-hour .

Soundtracks are a tool to help desensitize dogs to noises that result in fearful reactions, agitated reactions, or highly excitable reactions. How they are used is dependent on the dog’s behavior. Used improperly you can sensitize a dog to sounds by making the reaction stronger or hyper sensitive to the sounds. Sensitization can also result in the dog becoming sensitive to additional sounds that were previously of no concern.

https://www.homeskooling4dogs.com/fears-phobias-reactivity