*PLUMBERSSTOCK EXPERT* responded:
Thank you for seeking assistance from the PlumbersStock team about the Ducane 4AC13L36P-7A. This air conditioner has a sound rating of 74 dBa. For reference, please check page 2 of this Specification Sheet. In some cases, noise has been traced to gas pulsations in the living area from improper installation of the equipment. Also, the outdoor section should be installed on a solid foundation. The foundation slab should NOT be in contact with or be an integral part of the building foundation to minimize the possibility of noise transition. For more details about its operation, you may want to check pages 2 and 6 of this Manual. If everything is set and the noise keeps disturbing you, another option is, you can control and reduce the sound/noise of this air conditioning unit through using a sound blanket. The sound blanket designed to fit with this model is the Ducane 14W00. This Ducane 14W00 is not yet in our system but updating of information is ongoing. If you'd like to order this sound blanket, just have the product number ready and call one of our knowledgeable customer service representatives @ 435-868-4020 between 8:00 am and 7:00 pm MST or through e-mail @ firstname.lastname@example.org. They'll be happy to order that for you. Have a fantastic day ahead!