The answer to 'wasp scratching sounds' is that the sounds are likely caused by a wasp nest in or around your home. Wasps make a scratching or scraping noise as they build their paper nests, which can often be heard from inside the home. These sounds are a clear sign of an active wasp nest and should be addressed promptly.
Wasps can be aggressive and their stings are painful, so it's important to take action to remove the nest. If the nest is in an easily accessible area, you may be able to remove it yourself using an insecticide spray. However, if the nest is located in a hard-to-reach area or if you have a large infestation, it's best to call a professional pest control technician to handle the removal safely and effectively.