Dry friction damper with damping force perpendicular to principa
Dual acoustic horn assembly
Dual acoustical passage stethoscope
Dual bandpass secondary source
Dual cross-flow muffler
Dual earplug
Dual entry plug muffler
Dual flow turbine engine muffler
Dual frequency side branch resonator
Dual layer acoustical ceiling tile having an improved sound...
Dual mode multiple-element resonant cavity piezoceramic borehole
Dual mode seismic source vibrator
Dual mono center channel
Dual range horn with acoustic crossover
Dual sonic character acoustic panel and systems for use thereof
Dual speaker
Dual-constrained viscoelastic damping mechanism for structural v
Dual-mode hydraulic vibrator
Dual-sensor stethoscope with electronic sensor
Duct and process for producing the same