Plug insert to be inserted in an earplug for clipping intense, brief acoustic peaks by wave phase displacement
FR2965967A1
Acoustic filter to be inserted in an ear plug enabling the perception of sounds with a + 2db / octave attenuation slope
FR2942395A1
Ear mold device for forming e.g. earphone for walkman, has piston for exerting pressure on molding material for passing flow of material towards ear, and application plate for controlling flow of molding material
FR2845308A1
Hearing device and its implementation process
FR2849771A1
Anti noise device for agro-food industrys operator, has cord link to connect a specific molded ear tip including a traceability electronic integrated chip, and a technical piece grouping a sound calibration system
FR2845273A1
Ear protector manufacturing procedure uses impression taken from auditory canal by an elastomer material on a holder with a piston
