μ-Metal barrier provided in connection with the receiver casing lid assembly
A hearing aid may include a housing shaped to rest behind an ear of a user, electric circuitry, a microphone, an antenna which receives wireless signals, a signal processor, a receiver, and a sound guide configured to sound from the receiver towards the ear. An enclosure may be provided for sound isolation of the receiver and includes a detachable lid providing access to the enclosure. A suspension body may be attached to a first suspension area and a second suspension area of the lid. The suspension body holds the receiver suspended within the enclosure. The suspension body includes suspension members connected to the suspension areas of the lid. The suspension members include protrusions that form a shelf that holds a metal shield plate between the lid and the receiver and spaced away from the receiver.
1. A hearing aid, comprising:
a housing shaped to rest behind an ear of a user, the housing enclosing
electric circuitry which interconnects power input terminals or battery terminals,
a microphone which converts a sound signal into an electric signal in the circuitry,
an antenna which converts possible wireless signals into electric signals in the circuitry,
a signal enhancer or amplifier which amplifies the electric signals from the microphone and/or from the antenna to produce an amplified signal,
a receiver unit which receives the amplified signal and produces sound waves,
a sound guide configured to guide the sound waves from the receiver unit towards the ear of the user;
an enclosure provided within the housing for sound isolation of the receiver, the enclosure including
a detachable lid providing access to the enclosure, the receiver flexibly suspended for free movement from the detachable lid at a first suspension area of the detachable lid and a second suspension area of the detachable lid, distanced from said first suspension area;
a metal shield plate provided between the receiver and the detachable lid, the metal shield plate extending from the first suspension area to the second suspension area;
a suspension body made of a soft flexible material configured to hold the receiver;
a first suspension member extending from a first end of the suspension body and connected to the first suspension area of the detachable lid; and
a second suspension member extending from a second end of the suspension body and connected to the second suspension area of the detachable lid, wherein
the first suspension member includes a first shelf spaced apart from the detachable lid,
the second suspension member includes a second shelf spaced apart from the detachable lid, and
the metal shield plate rests on the first shelf and the second shelf and is distanced from the receiver by the shelves.
2. The hearing aid as claimed in claim 1 , wherein the antenna is provided above the metal shield at an upper side of the lid.
3. The hearing aid as claimed in claim 2 , wherein
two wires are externally soldered to connection points on a receiver housing, and
two wires internally in the receiver housing interconnect said connection points from an inside wall of the receiver housing and pass as a twisted lead pair from the connection points to a first terminal and a second terminal of the receiver.
4. A hearing aid, comprising:
a housing shaped to rest behind an ear of a user;
electric circuitry which interconnects power input terminals or battery terminals;
a microphone which converts a sound signal into an electric signal in the circuitry;
an antenna which converts possible wireless signals into electric signals in the circuitry;
a signal enhancer or amplifier which amplifies the electric signals from the microphone and/or from the antenna to produce an amplified signal;
a receiver unit which receives the amplified signal and produces sound waves;
a sound guide configured to guide the sound waves from the receiver unit towards the ear of the user;
an enclosure provided within the housing for sound isolation of the receiver, the enclosure including
a detachable lid providing access to the enclosure, the detachable lid including
a first suspension area and a second suspension area, distanced from the first suspension area, the receiver flexibly suspended at the first suspension area and the second suspension area;
a suspension body made of a soft flexible material configured to hold the receiver;
a first suspension member extending from a first end of the suspension body and connected to the first suspension area; and
a second suspension member extending from a second end of the suspension body and connected to the second suspension area, wherein
the first suspension member includes a first protrusion extending in a direction toward the detachable lid, an anterior surface of the first protrusion forming a first shelf spaced apart from the detachable lid,
the second suspension member includes a second protrusion extending in a direction toward the detachable lid, an anterior surface of the second protrusion forming a second shelf spaced apart from the detachable lid, and
a void is formed between the first shelf, the second shelf, and a surface of the detachable lid, the void being configured to receive and hold a metal shield plate distanced from the receiver.