The Naval Surface Warfare Center Philadelphia has a requirement for Hottinger Bruel & Kjaer (HBK) models 4966, 4966-H-041and 4954-B microphones, this will be fulfilled on a Sole Source basis from Hottinger Bruel & Kjaer. The proposed contract action is for supplies or services for which the Government intends to solicit and negotiate with only one source under authority of FAR 13.106-1 (b) (1) (i). Any questions regarding this notice should be emailed to: jillian.randazzo@navy.milNo phone calls will be