Hello Dave,
Thanks for writing a review and we’re sorry to have learned your issues. The VT2525 muffler/diffuser is designed to disperse the airflow of the air coming out of the exhaust. Because of the way the product is designed, there is also a small reduction in noise level and it also can improve the pitch of the exhaust noise on most vacs. If you are using the vacuum for prolonged period of time and or in smaller spaces, we do recommend using ear protection.
If you have questions or concerns, you may call our Customer Service at 1-800-474-3443 from Monday to Friday between 8:00 AM to 5:00 PM Central Time or send us an email at info@ridgidvacs.com and we'll be glad to assist you.
Thanks,
RIDGID