Specifications include, but are not limited to: Anechoic chamber dimensions and details (for reference only-do not bid): • Internal structure volume: 10 x 18 x 10 (ft) • Foam panels: 1 x 1 ft panel with 8 in wedge design Microphone Technical Requirements: • Microphone quantity: 24 • Microphone Diameter: ½ in • Frequency range: 20 Hz – 20000 Hz • Dynamic range: 17 dB – 130 dB • Capable of operating in temperatures ranging from -4 to 150 deg F • Inherent noise:16 dB • Lower limiting frequency: 1 Hz • Temperature coefficient: .004 dB/°C • Sensitivity: 50 mV/Pa • Pressure Coefficient: -0.01 dB/kPa Hardware and software requirements: • Analyzer and software capable of time-history noise level logging in the 1/3rd octave band • Frequency spectrum analysis • Time-history noise decibel level logging • Windscreen for operating array in windy conditions • Cabling and hardware capable of operating array from a minimum 50 ft distance • Shock-proof cases for field use, travel, and safe storage of microphones and all related hardware • Permanent license to analyzing software