The versatility of the Chaparral Model 2 infrasound sensor lends itself to multiple integration applications; however, the sensor´s form factor doesn´t support certain integration applications where size and weight considerations are critical. In an effort to meet these added requirements, the Chaparral Model 2 infrasound sensor has been redesigned from the bottom up. The Chaparral Model 7´s new sensor package has a precision-made aluminum casing with increased package strength. The sensor package also doubles as the backing volume, thereby providing a more stabilized sensing capability in volatile environments. The sensitivity switch has been relocated to an external area easily accessible to support rapid changes for experimentation and/or operations in the field, thereby virtually eliminating the need to open the sensor package under inhospitable conditions. A removable data/power cable also is provided. Chaparral Model 7 has adjustable leg supports designed to ensure optimum clearance when emplaced. This gives users flexibility in using the default height (3-inches), using the user configurable heights to meet variable environmental conditions, or not using the legs at all - allowing for easy integration into other systems. The Chaparral Model 7 maintains the Model 2´s pass band from 0.1 to 100 Hz, but is factory configurable to 400 Hz - enabling sensing in both the infrasound and low acoustic bands. The Model 7 is also configurable for 12-volt DC applications with reduced sensitivity as the trade off. The sensor´s new form factor, reduced dimensions (less than 2.5 inches OSD and under 1-pound), and optional calibration adaptor (for use with the Chaparral Portable Piston-phone) lend the Chaparral Model 7 to a multitude of infrasound and low acoustic applications not previously suited to the Chaparral Model 2 infrasound sensor.

a) Distributed Sensor Networks Program Office, 100 Boeing Way, Titusville, Florida, 32780, USA
Eric.A.Skowbo@Boeing.com
b) Chaparral Physics Consultants of NM, Inc., 7405 Capulin Road, N.E., Albuquerque, New Mexico, 87109, USA
Bullard@abq.com