Brain signal sensing headset

A device for recording brain activity of a subject, comprising:

• i) a plurality of electrode assemblies, each electrode assembly having multi-directional adjustability in orientation and comprising:
• a shell with tabs protruding from opposite sides of an outer surface of the shell, the tabs being rotatable with respect to the shell;
• a sleeve inside the shell, the sleeve having a clearance between the sleeve and the shell to allow angular tilting of the sleeve within the shell;
• an elastic element attaching a first end of the sleeve to an interior end of the shell;
• and
• an electroencephalography (EEG) electrode removably inserted into the sleeve, with a contact surface of the EEG electrode facing a subject's head;
• ii) a housing having a bottom surface, a first lateral edge, and a second lateral edge, wherein the housing contains an energy source and electronic circuitry for the plurality of electrode assemblies;
• iii) a first arm removably coupled to the housing and shaped to extend along the subject's head from the first lateral edge of the housing, the first arm having a first pair of rails along a first length of the first arm, wherein the first pair of rails borders a first aperture that allows access to the subject's head, and the first pair of rails has first grooves along interior edges facing the first aperture;
• iv) a second arm removably coupled to the housing and being shaped to extend along the subject's head from the second lateral edge of the housing, the second arm having a second pair of rails along a second length of the second arm, wherein the second pair of rails borders a second aperture that allows access to the subject's head, and the second pair of rails has second grooves along interior edges facing the second aperture;
• and
• v) a third arm removably coupled to the housing, the third arm extending along the subject's head in an anterior-to-posterior direction;
• wherein:
• a first electrode assembly of the plurality of electrode assemblies is mounted in the first aperture of the first arm, the tabs of the first electrode assembly being slidably seated in the first grooves of the first aperture;
• and
• a second electrode assembly of the plurality of electrode assemblies is mounted in the second aperture of the second arm, the tabs of the second electrode assembly being slidably seated in the second grooves of the second aperture.

A device for recording brain activity of a subject, comprising:

• i) a first arm shaped to extend along a subject's head, the first arm having a first aperture that allows access to the subject's head;
• ii) a sensor assembly that has multi-directional adjustability in orientation, the sensor assembly comprising:
• a shell configured for multi-directional rotation;
• a sleeve inside the shell;
• an elastic element attaching a first end of the sleeve to an interior end of the shell;
• and
• a sensor removably inserted into the sleeve, with a contact surface of the sensor facing the subject's head;
• and
• iii) a housing that contains an energy source and operational components for the sensor assembly;
• wherein:
• the first arm has a first pair of rails along a first length of the first arm, the first pair of rails bordering the first aperture and having grooves along interior edges facing the first aperture;
• the shell has tabs protruding from opposite sides of an outer surface of the shell, the tabs being rotatable with respect to the shell;
• the sleeve has a clearance between the sleeve and the shell to allow angular tilting of the sleeve within the shell;
• and
• the sensor assembly is mounted in the first arm, with the tabs slidably seated in the grooves of the first pair of rails.