Hearing aid system with lost partner functionality

摘要

A hearing aid system includes a first (1) and a second (11) hearing aid, each having link means for establishing a short-range wireless connection (20) between the first and the second hearing aid. At least the first hearing aid has means to monitor whether the link to the second hearing aid is active and alert means to issue an alert based on a condition of the link or on a condition of the second hearing aid. The alert can be a spoken message, a visual indicator, or a message sent to an external unit (30). The invention further provides a method to issue an alarm in a first hearing aid.

主权项

1. A hearing aid system comprising a first hearing aid and an external device, each having:
a short range communications component for establishing a short-range wireless link between the first hearing aid and the external device; a monitor component to monitor whether the link is active; and an alert component to issue an alert based on the detection of no traffic at the link within a defined second period of time, following a first period of time with monitored active traffic on the link, said alert component making an activity determination when said monitor component indicates that said link has been active for a first period of time, and being responsive to said activity determination to issue said alert when said monitor component indicates that said link has been inactive for said second period of time; wherein the alert component comprises: a first counter to count the clock cycles elapsed since the onset of traffic, a first comparator adapted to delay the start of active link detection until a first predetermined count is reached; a watchdog timer comprising a second counter adapted to count the clock cycles elapsed since the tripping by the first comparator, the watchdog timer having a second comparator to determine if a second predetermined count is reached; and alarm logic for issuing an alert when the second comparator indicates that the second predetermined count has been reached by the second counter.