Electrical nerve stimulation with broad band low frequency...

A - Human Necessities – 61 – N

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A61N 1/36 (2006.01) H04R 25/00 (2006.01) A61F 11/04 (2006.01)

Patent

CA 2693409

A system and method of generating electrode stimulation signals for an implanted multi -channel electrode array of a cochlear implant includes processing an acoustic audio signal with a bank of filters. Each filter in the bank of filters is associated with at least one channel having an electrode. The bank of filters includes a first band pass filter that produces a broadband signal b(t) with frequencies that substantially cover at least one of a pitch frequency range of 100 Hz to 400 Hz and a first format range of 400 Hz - 1000 Hz. At least one electrode associated with the first band pass filter is activated with electrode stimulation signals based, at least in part, on the broadband signal b(t). The filter bank may include at least one electrode associated with one or more filters other than the first band pass filter, the one or more filters producing signals having only higher frequencies than broadband signal b(t).

L'invention concerne un système et un procédé de génération de signaux de stimulation d'électrode pour un réseau d'électrode multicanal implanté d'un implant cochléaire comprenant le traitement d'un signal audio acoustique avec un banc de filtres. Chaque filtre dans le banc de filtres est associé à au moins un canal ayant une électrode. Le banc de filtres comprend un premier filtre passe-bande qui produit un signal à large bande (b(t)) avec des fréquences qui couvrent sensiblement au moins une portée de fréquence de pas allant de 100 Hz à 400 Hz et une première portée de format allant de 400 Hz à 1 000 Hz. Au moins une électrode associée au premier filtre passe-bande est activée avec des signaux de stimulation d'électrode basés au moins en partie sur le signal à large bande (b(t)). Le banc de filtres peut comprendre au moins une électrode associée à un ou plusieurs filtres autres que le premier filtre passe-bande, le ou les filtres produisant des signaux ayant seulement des fréquences plus élevées que le signal à large bande (b(t)).

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