NOVEL HEARING PROTECTION DEVICE AND METHOD AND SECURE EARBUD ASSEMBLY
申请公布号:US2010071708(A1)
申请号:US20080522161
申请日期:2008.01.04
申请公布日期:2010.03.25
发明人:LENHARDT MARTIN L.
分类号:A61F11/08
主分类号:A61F11/08
摘要:A passive level dependent hearing protection device for insertion into an ear canal is made of a flexible bladder attached to a frame and where the bladder utilizes valves to evacuate air from the ear canal. The device thereby causes transmission loss of acoustic waves wherein low frequency steady state and impact noises are attenuated but soft noises such as speech are attenuated to a lesser degree. The device incorporates a safety feature for preventing creation of too low an air pressure in the ear canal. Finally, the device may incorporate a transducer.
(A) ;PROPULSION APPARATUS FOR ARTIFICIAL SATELLITE
DISPOSITIF DE PROTECTION DU TRANSISTOR DE DECOUPAGE HAUTE TENSION POUR MONTAGE REDRESSEUR
INSTALLATION POUR LE DEPOT DE COUCHES MINCES EN GRANDE SURFACE EN PHASE VAPEUR REACTIVE PAR PLASMA
DISPOSITIF DE FORAGE ROTATIF A PERCUSSION
DISPOSITIF DE FERMETURE ET DE MANUTENTION D'UN RECIPIENT ET PROCEDE DE FABRICATION DUDIT DISPOSITIF
SETT ATT TILLVERKA BARRIERFORSEDDA RORFORMIGA BEHALLARE AV TERMOPLAST
COMPOSITION DE RESINE DE CHLORURE DE VINYLE CONTENANT UN ADJUVANT DE MISE EN OEUVRE
TUNN FILM AV HOGMOLEKYLER POLYETEN OCH SETT ATT FRAMSTELLA DENNA
BIPOLERT ELEKTROKIRURGISKT VERKTYG
ASK FORSEDD MED LOCKDEL OCH FORFARANDE FOR FRAMSTELLNING AV ASK
SISTEMA PER REALIZZARE ELABORAZIONI CONVOLUTIVE VELOCI SU INFORMAZIONI RAPPRESENTATIVE DI IMMAGINI
ELECTRO-AIMANT A FACE DE FRICTION REMPLACABLE POUR FREIN
COPOLYMERES MODIFIES DE L'ETHYLENE ET D'AU MOINS UNE A-OLEFINE ET PROCEDE POUR LEUR PREPARATION
PROCEDE POUR LA PREPARATION DE COPOLYMERES SOUPLES OU SEMI-DURS D'ETHYLENE-A-OLEFINE
PELLICOLE SOTTILI DI POLIETILENE AD ALTO PESO MOLECOLARE,E PROCEDIMENTO PER LA LORO PREPARAZIONE
DISPOSITIF ANTI-INSECTES PARTICULIEREMENT ADAPTE POUR LES CAMPEURS