Compact hands-free adapter for use with a cellular telephone

A portable hands-free adapter for use with a cellular telephone, the device comprising:

• a loudspeaker electrically coupleable to the output of a cellular telephone;
• a microphone electrically coupleable to the input of a cellular telephone;
• a housing containing the loudspeaker and microphone, the housing being approximately pocket-sized;
• attenuation circuitry coupled to the loudspeaker and microphone;
• and
• sound insulation positioned between the loudspeaker and microphone,
• wherein the attenuation circuitry and sound insulation reduce howling sufficiently to enable use of the device as a speakerphone.

A portable speakerphone device adaptable for use with a cellular telephone, the device comprising:

• a loudspeaker electrically coupleable to the output of a cellular telephone and having a loudspeaker outlet;
• a microphone electrically coupleable to the input of a cellular telephone and having a microphone outlet facing in a first direction;
• a housing containing the loudspeaker and microphone, the housing being approximately pocket-sized and forming a plane;
• and
• means for insulating sound positioned within the housing between the loudspeaker and microphone;
• wherein the outlet of the loudspeaker faces in a first direction substantially normal to the plane of the housing and the outlet of the microphone faces in a second direction substantially normal to the plane of the housing.

A portable speakerphone device adaptable for use with a cellular telephone, the device comprising:

• a loudspeaker electrically coupleable to the output of a cellular telephone;
• a microphone electrically coupleable to the input of a cellular telephone;
• a housing containing the loudspeaker and microphone, the housing being approximately pocket-sized;
• and
• means for insulating sound positioned within the housing between the loudspeaker and microphone;

A portable speakerphone device adaptable for use with a cellular telephone, the device comprising:

• a loudspeaker electrically coupleable to the output of a cellular telephone and having a loudspeaker outlet;
• a microphone electrically coupleable to the input of a cellular telephone and having a microphone outlet facing in a first direction;
• and
• a housing containing the loudspeaker and microphone, the housing being approximately pocket-sized and forming a plane;
• wherein the outlet of the loudspeaker faces in a first direction substantially normal to the plane of the housing and the outlet of the microphone faces in a second direction substantially normal to the plane of the housing.

A method for making a portable speakerphone device adaptable for use with a cellular telephone, the method comprising:

• providing pocket sized housing means defining an exterior of the device;
• disposing loudspeaker means within the housing means;
• disposing microphone means within the housing means;
• providing means for reducing howling sufficiently to enable use of the device as a telephone speakerphone.

A method for making a portable speakerphone device adaptable for use with a cellular telephone, the method comprising:

• providing pocket sized housing means defining an exterior of the device;
• disposing loudspeaker means within the housing means;
• disposing microphone means within the housing means;
• providing attenuation circuitry means;
• and
• providing sound insulation means positioned between the loudspeaker means and the microphone means, wherein the attenuation circuitry means and the insulation means reduce howling sufficiently to enable use of the device as a telephone speakerphone, and wherein the outlet of the loudspeaker faces in the same direction as the outlet of the microphone, and wherein a line extending between the outlet of the loudspeaker and the outlet of the microphone would form a right angle with a line extending in the direction that the outlet of the loudspeaker and the outlet of the microphone face.