An improved ribbon microphone preferably includes a housing tube and a microphone assembly. The microphone assembly includes a ribbon transducer, a reflector bar, a first magnet, a second magnet, a upper ribbon retainer and a lower ribbon retainer. The housing tube includes at least one audio aperture. The ribbon transducer includes a thin strip of metal with an embossed non-linear pattern formed therein. The lower ribbon retainer is the same as upper ribbon retainer, but turned upside down. The ribbon retainer includes a retainer base and a ribbon clamp. The retainer base includes a clamp slot to receive the ribbon clamp. Each end of the ribbon transducer is retained between the ribbon clamp and the retainer base. Opposing ends of magnets and reflector bar are retained in the upper and lower ribbon retainer. An upper end cap and a lower end cap capture the microphone assembly within the housing tube.

Disclosed herein are methods and systems for appliances, including networked or “Internet-of-Things” appliances.

A microphone, comprising at least two electrodes, spaced apart, configured to have a magnetic field within a space between the at least two electrodes; a conductive fiber, suspended between the at least two electrodes; in an air or fluid space subject to waves; wherein the conductive fiber has a radius and length such that a movement of at least a central portion of the conductive fiber approximates an oscillating movement of air or fluid surrounding the conductive fiber along an axis normal to the conductive fiber. An electrical signal is produced between two of the at least two electrodes, due to a movement of the conductive fiber within a magnetic field, due to viscous drag of the moving air or fluid surrounding the conductive fiber. The microphone may have a noise floor of less than 69 dBA using an amplifier having an input noise of 10 nV/√Hz.

The present invention relates to a stick-type vibrating driver and, more specifically, to a stick-type vibrating driver implemented so as to enable vibration to be transmitted, by using a planar movable coil plate and a stick-shaped magnet, to an object to be vibrated. The stick-type vibrating driver according to the present invention can comprise: an outer body formed in a stick shape; a magnetic circuit part formed inside the outer body, and having a pair of magnetic bodies spaced apart with the movable coil plate therebetween; a vibrating part formed inside the outer body, and vertically vibrating according to the driving of the magnetic circuit part in a state in which the upper and lower ends of the movable coil plate are fixed; and upper and lower metal suspensions respectively connected between the outer body and the vibrating part.

A microphone, comprising at least two electrodes, spaced apart, configured to have a magnetic field within a space between the at least two electrodes; a conductive fiber, suspended between the at least two electrodes; in an air or fluid space subject to waves; wherein the conductive fiber has a radius and length such that a movement of at least a central portion of the conductive fiber approximates an oscillating movement of air or fluid surrounding the conductive fiber along an axis normal to the conductive fiber. An electrical signal is produced between two of the at least two electrodes, due to a movement of the conductive fiber within a magnetic field, due to viscous drag of the moving air or fluid surrounding the conductive fiber. The microphone may have a noise floor of less than 69 dBA using an amplifier having an input noise of 10 nV/√Hz.

A novel phantom-powered FET (field effect transistor) circuit for audio application is disclosed. In one embodiment of the invention, a novel phantom-powered FET preamplifier gain circuit can minimize undesirable sound distortions and reduce the cost of producing a conventional preamplifier gain circuit. Moreover, in one embodiment of the invention, one or more novel rounded-edge magnets may be placed close to a ribbon of a ribbon microphone, wherein the one or more novel rounded-edge magnets reduce or minimize reflected sound wave interferences with the vibration of the ribbon during an operation of the ribbon microphone. Furthermore, in one embodiment of the invention, a novel backwave chamber operatively connected to a backside of the ribbon can minimize acoustic pressure, anomalies in frequency responses, and undesirable phase cancellation and doubling effects.

An improved stethoscope design with an extended detection range for sounds above and below the range of human hearing and artificial intelligence connection to other clinical data for analysis, wherein the stethoscope assesses spatial distribution of bodily sounds using a sensor array as well as amplifies the volume of bodily sounds and provides for recording, receiving and processing same.

A quasi-ribbon speaker comprises a perforated planar metal sheet, a plurality of parallel, spaced-apart elongated magnetic bars mounted to the metal sheet in an alternating pole arrangement, a flexible planar diaphragm positioned parallel to the metal sheet, and a plurality of electronic traces affixed to the diaphragm. Except at each of one or more areas of resonance, the electronic traces are parallel to each other and each electronic trace is positioned above a corresponding gap between two adjacent magnetic bars. At each of the one or more areas of resonance a portion of one or more electronic traces is positioned partly or fully overlapping a portion of one or more of the magnetic bars.

A novel phantom-powered FET (field effect transistor) circuit for audio application is disclosed. In one embodiment of the invention, a novel phantom-powered FET preamplifier gain circuit can minimize undesirable sound distortions and reduce the cost of producing a conventional preamplifier gain circuit. Moreover, in one embodiment of the invention, one or more novel rounded-edge magnets may be placed close to a ribbon of a ribbon microphone, wherein the one or more novel rounded-edge magnets reduce or minimize reflected sound wave interferences with the vibration of the ribbon during an operation of the ribbon microphone. Furthermore, in one embodiment of the invention, a novel backwave chamber operatively connected to a backside of the ribbon can minimize acoustic pressure, anomalies in frequency responses, and undesirable phase cancellation and doubling effects.

An improved stethoscope design with an extended detection range for sounds above and below the range of human hearing and artificial intelligence connection to other clinical data for analysis.