Safety device and method for emitting a directional acoustic...

Sandwich acoustic panel

Sandwich structure having a frequency-selective double-wall...

Sandwich structure with partial damping layers

Scanning acoustic microscope

Selective active cancellation system for repetitive phenomena

Self-deploying instrument assembly

Shear mode folded shell projector

Shock-wave attenuation apparatus

Side looking sonar apparatus

Signal processing means for sensing a periodic signal in the...

Signal transmitter device comprising an electrical acoustic...

Signalling apparatus

Silencer for passage

Single and multiple channel block adaptive methods and...

Single cavity automobile muffler

Single-housing multi-trumpet air horn

Siren

Siren

Sonar apparatus