Hi Leslie, Because you asked about this specific blower, we are assuming it us being purchased for an existing bounce house. The short answer is the blowers are all similar in noise output to a common vacuum cleaner. The long answer is as follows (excerpt from our blog): We often get this question, so we had an independent lab measure the decibel rating of our blowers, while attached to a bounce house, which is the most practical application for this test. Each measurement was taken 1 meter from different parts of the blower