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A haircutting appliance comprises an enclosed housing having a hollow handle connecting the housing to a vacuum source to carry away cut hairs from a subject's head.
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| Number | Title | Issue Date |
| 8306242 | Heyser spiral low frequency correction of FIR filters A method of operating a loudspeaker includes providing a digital audio signal and identifying a target transfer function to be applied to the signal. At least one coefficient of an FIR filter is generated. The generating includes performing Heyser spiral curve fitti... | 11/06/2012 |
| 8059832 | Audio signal processing method and apparatus When an inputted audio signal is outputted from a speaker device having a predetermined input-output characteristic, the predetermined input-output characteristic being selected such that the linearity of an output level with respect to an input signal is approximat... | 11/15/2011 |
| 7986795 | Method and apparatus for protecting media content against unauthorized duplication Methods and apparatuses for media playback system are disclosed, including a signal source for providing electrical signal representing media content; a processing unit for processing signal from the signal source; a distorting unit for introducing distortion to sig... | 07/26/2011 |
| 7593535 | Neural network filtering techniques for compensating linear and non-linear distortion of an audio transducer Neural networks provide efficient, robust and precise filtering techniques for compensating linear and non-linear distortion of an audio transducer such as a speaker, amplified broadcast antenna or perhaps a microphone. These techniques include both a method of char... | 09/22/2009 |
| 7317374 | Self-damped inductor An inductor with self-damping properties for use in multiple applications including for high power broadband frequency applications is provided by a coil having an input end and an output end and wound about a core of magnetically permeable material and an eddy curr... | 01/08/2008 |
| 7245726 | Noise canceling microphone system and method for designing the same A microphone housing improves the broadband noise canceling performance of an active noise canceling microphone system while also ensuring improved speech transmission through the system. First and second microphone elements are selected each having a diameter “dâ... | 07/17/2007 |
| 7174023 | Automatic wind noise reduction circuit and automatic wind noise reduction method An object is to provide an automatic wind noise reducing circuit and an automatic wind noise reducing method, which are capable of coping with a multichanneling trend of audio signals, and improving performance as well as the degree of freedom in system design. Arit... | 02/06/2007 |
| 7154333 | Amplifier for inductive loads An amplifier circuit controls the output current through an inductive load. A signal is amplified by one or more op amps, and sourced into a back to back coupling of an NPN transistor and a PNP transistor. In a positive circuit segment, current is sourced to an indu... | 12/26/2006 |
| 7088832 | IFB system apparatus and method The present invention provides a cancellation signal which may be combined with a radio or television program signal to provide a mix minus signal for use in IFB communication with the talent. A cancellation signal circuit is responsive to a talent signal to delay a... | 08/08/2006 |
| 6438240 | Circuit to improve transducer separation in handsfree telephone In a device having a sound source within an enclosure and a first microphone for picking up sounds outside the enclosure, a system for improving acoustic separation between the sound source and first microphone comprising an additional microphone located ... | 08/20/2002 |
| 6137886 | Active vibration control method and apparatus An improved active vibration control system using feedback and pseudo-feedforward sensor inputs is provided for solving the problem of random and repetitive active vibration control and noise cancellation in a system. In a first embodiment of the inventio... | 10/24/2000 |
| 5917922 | Method of operating a single loud speaker drive system A method of operating a single speaker driver circuit having, a low frequency input coil connected between an audio circuit output and the input of the speaker, a low frequency return coil, connected between the return of the speaker and the return of the... | 06/29/1999 |
| 5615272 | Single loud speaker drive system A single speaker driver circuit having, a low frequency input coil connected between an audio circuit output and the input of the speaker, a low frequency return coil, connected between the return of the speaker and the return of the audio signal, the low... | 03/25/1997 |
| 5519781 | Self damping speaker matching device and method A damping circuit for speaker systems of the type containing at least one speaker having a speaker coil with an input and an output connection and having a matching coil adapted to be connected in series with the input connection of the speaker coil and a... | 05/21/1996 |
| 5386474 | Amplifier-speaker interface correction circuit A pair of amplifiers are coupled to respective loudspeakers. The output terminals of the amplifiers are coupled to each other through a filter network for reducing the effects of time delayed acoustic feedback from the ambient surroundings and from the ot... | 01/31/1995 |
| 5373563 | Self damping speaker matching device A damping circuit for speaker systems of the type containing at least one speaker having a speaker coil with an input and an output connection and having a matching coil adapted to be connected in series with the input connection of the speaker coil and a... | 12/13/1994 |
| 4442323 | Microphone with vibration cancellation A microphone unit particularly adapted to be used as a built-in microphone for a device such as a tape recorder in which vibration-induced components in the output of the microphone are substantially eliminated. An electret-type microphone element is moun... | 04/10/1984 |
| 4427845 | Dynamic microphone A dynamic microphone in which vibrations transmitted to the case of the microphone are cancelled over a very wide frequency range. A moving coil type microphone unit sensitive to sound and a moving coil type vibration pickup unit sensitive to vibrations t... | 01/24/1984 |
| 4426552 | Speaker distortion compensator In sound generating systems, it has been ascertained that various factors cause spurious, audible emanations when transducers of reasonable size and cost are driven in complex motions characteristic of typical high fidelity audio reproduction. In a typica... | 01/17/1984 |
| 4420655 | Circuit to compensate for deficit of output characteristics of a microphone by output characteristics of associated other microphones A circuit for compensating for frequency characteristic of microphone output which is arranged to have a combination of a microphone member of the pressure gradient type having a proximity effect represented by a rise in its low frequency range sensitivit... | 12/13/1983 |
| 3967064 | Low noise electronic circuit, transducer using the same, and method An electronic circuit and method used in conjunction with transducers for eliminating noise signals which includes an AC source of excitation for first and second transducer coils, called pickoff coils located in first and second signal channels. Output f... | 06/29/1976 |
