Quotables
"Flight by machines heavier than air is unpractical and insignificant, if not utterly impossible."
Simon Newcomb, astronomer ; Said in 1902, less than two years before the first flight at Kitty Hawk
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| Number | Title | Issue Date |
| 6108431 | Loudness limiter For limiting the signal transmitted to the human ear in dependency on an incoming acoustical signal, there is provided a signal processor, the output of which acts on an output transducer and on a calculator unit which calculates according to a preselecte... | 08/22/2000 |
| 5907235 | Method and apparatus for generating a supply voltage for a hearing device The present invention relates to a method to generate at least a supply voltage to supply energy to a hearing device, whereas the ratio between the supply voltage and the source voltage is adjustable. The hearing device substantially comprises a source (Q... | 05/25/1999 |
| 5719528 | Hearing aid device A hearing aid with a mechanical/electrical input converter and an electromechanical output transducer. The hearing aid includes a signal processing unit with an input operationally connected to the output of the input converter. The signal processing unit... | 02/17/1998 |
| 5661814 | Hearing aid apparatus The acoustical-mechanical disturbance feedback between the electrical-acoustical converter and the acoustical-electrical converter of a hearing aid apparatus is compensated by means of an adaptive compensator filter which feeds back a signal derived from ... | 08/26/1997 |
