Sometimes outside (scary) noises can be very detrimental while training a dog to be okay with being home alone. So what can we do about it?
Have you tried putting the radio or TV on for your dog?
Even better, did you know that you can actually buy music especially tuned to the frequency of your dog's ear with the goal to help calm your dog?
Through The Dog's Ears, by Joshua Leeds and Lisa Spector, uses the latest science "to help alleviate separation anxiety, excitement with visitors, thunderstorm panic, and other behavior challenges" and is supposedly "psychoacoustically designed to calm your canine".
Another company is The Pet Calmer which uses a Bluetooth speaker "pre-loaded with frequency-modified music specially composed for canine hearing frequency level. Music has been clinically tested and proven to calm canine behaviours, reduce stress, and restore behavioural balance. Solve separation anxiety, noise phobias, excessive barking, ideal for grooming, dog training and therapy sessions. Portable for dog walking, car/air travel, veterinary and therapy visits".
Other alternatives include white, pink, brown or grey noise. These play noise at a low frequency to help calm the dog but, interestingly, for some dogs brown noise is a little too much due to its low rumbling so you are best to test out which suits your dog the most. You can buy many of these as apps for your phone etc. It's just a case of doing some Googling.
The bottom line is there are options that may help to mask the noises that actually make your dog fearful and may aid in the treatment of separation anxiety. So now it's time to do some research and work out what is the best fit for your dog.