197282 ⎘
Details of active noise control [ANC] covered by but not provided for in any of its subgroups; Means; Physical; Actuator details, e.g. composition or microstructure Fluid amplifiers, e.g. modulated gas flow speaker using electrovalves
Damping and actuating apparatus comprising magnetostrictive material, a vibration dampening device and use of said apparatus
System and method for a speaking chamber with voice cancellation