See
http://soundproofing.org/sales/ear_muffs.htm
>I already use ear soft insert (SNR=36) WITH muffler Peltor Optime 3
>(SNR=35),to protect from strong sudden impact noise come from upstairs.
>What better to do for sleeping at least?
>What about a insulated box?
>Thanks!!
BJ Nash
Super Soundproofing Senior Technical Advisor
Super Soundproofing Co. www.soundproofing.org
Ph: (760) 752-3030 FAX: (760) 752-3040
E-mail: bjnash@soundproofing.org
TOLL FREE: (888) 942-7723
Visit us at: www.soundproofing.org