Personal microwave and radio frequency detector
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorsRichard G. Olsen, John R. Forstall
Life of this patent
Estimating the term…
Abstract
A self-contained personal microwave and RF detector, which includes, inter alia, the housing and associated electronics of a standard hearing aid, is configured to produce an audible indication to a wearer thereof in response to electromagnetic fields of dangerously high levels within predetermined frequency ranges.
Claims8
In a standard hearing aid configured to normally convert input sound waves into electrical signals and, in turn, into amplified electrical signals within the audio frequency range, the standard hearing aid including a housing, a detachable ear-canal shell operatively attached to the housing, a microphone operatively attached to the housing and the detachable ear-canal shell for converting the input sound waves into the electrical signals within the audio frequency range at an output terminal of the microphone, an amplifier having an input terminal operatively connected to the output terminal of the microphone for increasing the level of the electrical signals within the audio frequency range at the output terminal of the microphone so as to produce at an output terminal of the amplifier amplified electrical signals within the audio frequency range, a battery operatively connected to the amplifier for supplying power thereto, a volume control operatively connected to the amplifier for controlling the level of the amplified electrical signals within the audio frequency range at the output terminal thereof and a loudspeaker operatively connected to the output terminal of the amplifier for converting the amplified electrical signals within the audio frequency range into output sound waves which are amplified facsimiles of the input sound waves and which are radiated, via the detachable ear-canal shell, into the ear-canal of a wearer, the standard hearing aid being modified to improve the reception of input modulated electromagnetic waves within a predetermined microwave frequency range and eliminating the reception of the input sound waves to produce a self-contained personal microwave detector, wherein the modification comprises:
- disconnecting the output terminal of the microphone from the input terminal of the amplifier;
- and
- connecting a wire to the input terminal of the amplifier and through and outside of the housing such that when the input modulated electromagnetic waves within the predetermined microwave frequency range are received, an audible signal is produced whose level and frequency is related to the modulation of the input modulated electromagnetic waves within the predetermined microwave frequency range thereby warning a wearer of the self-contained personal microwave detector of the presence of input modulated electromagnetic waves within the predetermined microwave frequency range whose levels are dangerously high.
In a standard hearing aid configured to normally convert input sound waves into electrical signals and, in turn, into amplified electrical signals within the audio frequency range, the standard hearing aid including a housing, a detachable ear-canal shell operatively attached to the housing, a microphone operatively attached to the housing and the detachable ear-canal shell for converting the input sound waves into the electrical signals within the audio frequency range at an output terminal of the microphone, an amplifier having an input terminal operatively connected to the output terminal of the microphone for increasing the level of the electrical signals within the audio frequency range at the output terminal of the microphone so as to produce at an output terminal of the amplifier amplified electrical signals within the audio frequency range, a battery operatively connected to the amplifier for supplying power thereto, a volume control operatively connected to the amplifier for controlling the level of the amplified electrical signals within the audio frequency range at the output terminal thereof and a loudspeaker operatively connected to the output terminal of the amplifier for converting the amplified electrical signals within the audio frequency range into output sound waves which are amplified facsimiles of the input sound waves and which are radiated, via the detachable ear-canal shell, into the ear-canal of a wearer, the standard hearing aid being modified to improve the reception of input modulated electromagnetic waves within a predetermined microwave frequency range and eliminating the reception of the input sound waves to produce a self-contained personal microwave detector, wherein the modification comprises:
- removing the microphone from the housing;
- connecting an output terminal of a detector diode to the input terminal of the amplifier;
- connecting an output terminal of a miniature microwave amplifier to an input terminal of the detector diode;
- and
- connecting a wire to an input terminal of the miniature microwave amplifier and through and outside of the housing so as to improve the reception of the input modulated electromagnetic waves within the predetermined microwave frequency range, and such that when the input modulated electromagnetic waves within the predetermined microwave frequency range are received, an audible signal is produced whose level and frequency is related to the modulation of the input modulated electromagnetic waves within the predetermined microwave frequency range thereby warning a wearer of the self-contained personal microwave detector of the presence of input modulated electromagnetic waves within the predetermined microwave frequency range whose levels are dangerously high.
Dependencies are inferred from the claim text.