WAVE TRANSMISSION THROUGH VERTICAL SLOTTED WALLS

Sound Transmission through Duct Walls

Acoustic &&breakout'' and &&breakin'' through duct walls had, until the late 1970s, been a rather neglected topic of research, particularly in the "eld of heating, ventilating and air-conditioning ducts. Since then, interest has grown and many publications have appeared in which predictive methods have been reported. Research in this area, especially that which has been conducted over the past ...

Experimental Studies of Wave Transmission through Single Perforated Sheets and Upright Perforated Wave Filters

Chirality-Dependent Transmission of Spin Waves through Domain Walls.

Spin-wave technology (magnonics) has the potential to further reduce the size and energy consumption of information-processing devices. In the submicrometer regime (exchange spin waves), topological defects such as domain walls may constitute active elements to manipulate spin waves and perform logic operations. We predict that spin waves that pass through a domain wall in an ultrathin perpendi...

Quantum Dynamics of Spin Wave Propagation through Domain Walls

Through numerical solution of the time-dependent Schrödinger equation, we demonstrate that magnetic chains with uniaxial anisotropy support stable structures, separating ferromagnetic domains of opposite magnetization. These structures, domain walls in a quantum system, are shown to remain stable if they interact with a spin wave. We find that a domain wall transmits the longitudinal component ...

Transmission of Low-frequency Internal Sound through Pipe Walls

Transmission loss measurements are reported for long steel pipes of circular crosssection, with air inside and out, excited by internal sound. At low frequencies (wavelength greater than the pipe diameter), most of the radiated sound is accounted for by pipe bending waves. In order to approach the much higher transmission loss predicted for pure breathing motion of the pipe, bending waves must ...