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A forehead support apparatus for resting a standing users forehead against a wall above a bathroom commode or urinal or beneath a showerhead.
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| Number | Title | Issue Date |
| 5291183 | Multi-functional alarming system An alarm system employing a vocoder which enables the alarm system to emit not only a buzzing sound but also a human voice, the alarm system being composed of a microphone, a microphone amplifier, a vocoder, a memory, a preamplifier, a power amplifier and... | 03/01/1994 |
| 5239587 | Sound recording device for use by hunters The present invention provides for the unattended recording of game animal sound activities in hunting areas by combining an external microphone and a sound recording apparatus housed within a weather resistent case. The sound recording apparatus includes... | 08/24/1993 |
| 5161197 | Acoustic analysis A process for evaluating spatial impression of an enclosed space includes the steps of generating output signals as a function of fluctuating sound pressure at two points spaced about one-quarter meter apart, band limiting the output signals to a pass ban... | 11/03/1992 |
| 5148484 | Signal processing apparatus for separating voice and non-voice audio signals contained in a same mixed audio signal A signal processing unit separates voice signals and non-voice audio signals contained in a mixed audio signal. The mixed audio signal is channel divided, and the voice signal portions of the channel divided mixed audio signal are detected and extracted a... | 09/15/1992 |
| 5144675 | Variable recovery time circuit for use with wide dynamic range automatic gain control for hearing aid A gain control voltage is applied to a control terminal of a variable gain hearing aid amplifier which is logarithmically related to a signal voltage level which is sensed at either an input terminal or an output terminal of the amplifier and which is bel... | 09/01/1992 |
| 5136656 | Probe microphone A probe microphone comprising an acoustic transducer with a cavity, to which a probe tube and a matching tube are connected. The matching tube is divided into several small tubes of a total internal transverse cross sectional area substantially correspond... | 08/04/1992 |
| 5121435 | Acoustic control circuit for frequency control of the flashing of Christmas light sets An acoustic control circuit for sequencing the flashing of a Christmas light set according to the rhythm and volume of a sound, and more particularly a flash control circuit which makes use of externally produced acoustic intensity to effect the sequence ... | 06/09/1992 |
| 5119426 | Linear array level meter displaying multiple audio characteristics A linear display device provides a floating bar type of display for instantaneous peak values and instantaneous average values of an audio signal. Pairs of respective peak and average comparators are coupled to a source of fixed value bias voltages. The c... | 06/02/1992 |
| 5093658 | Communication device capable of ambient sound level controlled transmissions A communication device (10) measures and compares (16,18) the ambient sound level of its environment. When the current ambient sound level exceeds a given threshold (52) the communication device automatically transmits (38) an information signal (44). Opt... | 03/03/1992 |
| 5072415 | Method and microprocessor-based apparatus for directly measuring a particular index for the evaluation of the environmental noise pollution This invention relates to a method and a microprocessor-based apparatus for directly measuring the noise using a nuisance index (LDI) bound to two physical parameters of the noise: the average energy level (LE) and the fluctuation le... | 12/10/1991 |
| 5070399 | Light color and intensity modulation system A color and intensity modulation system has an output to be connected to a color light projector and an input to receive a hue control signal and an intensity control signal including at least one modulation frequency component F. The system comprises a c... | 12/03/1991 |
| 5029477 | Integrity test for acoustic bearing defect detector This invention relates to the testing of apparatus used for on-line acoustic detection of bearing defects, particularly in railroad applications. A loudspeaker on each side of the section of track, in response to a microprocessor, generates simulated acou... | 07/09/1991 |
| 4935952 | Alarm-responsive apparatus and method A method and apparatus for detecting a fire-alarm acoustic signal includes an energy discriminator to segregate the desired acoustic tone from background noise. Digital circuitry responds to the active output of the energy discriminaton to dial into a tel... | 06/19/1990 |
| 4926484 | Circuit for determining that an audio signal is either speech or non-speech A threshold level for determining whether an input audio signal is a speech or non-speech signal in a voice operated recorder is changed in accordance with the ratio of the non-speech duration of the input audio signal to a predetermined period of time so... | 05/15/1990 |
| 4876721 | Method and device for identifying different species of honeybees A method and device have been provided for distinguishing Africanized honeybees from European honeybees. The method is based on the discovery of a distinct difference in the acoustical signatures of these two species of honeybees in flight. The European h... | 10/24/1989 |
| 4839857 | System for facilitating the control of audio information within a word processing document with audio input A word processing system in which text can be displayed on a display device and audio recording and playback means is provided to permit a user to record an audio message includes means for monitoring the volume level of speaking by the user and means for... | 06/13/1989 |
| 4839584 | Signal level display device for recording/reproducing apparatus A signal recording/reproducing apparatus having both bar-type and numeric signal-level displaying units which can be easily read. The apparatus includes a sample-and-hold circuit for sampling and holding an input signal at a first predetermined rate, a fi... | 06/13/1989 |
| 4834212 | Sound muffler for covering the mouth A human sound muffler and indicator for placement around the mouth of a user to absorb most of the sound emanating from the user's mouth including a microphone and associated electrical circuit for receiving unabsorbed sound and providing an indication of... | 05/30/1989 |
| 4831449 | Television apparatus incorporating receiver and video tape recorder in a common cabinet In a television apparatus having a television receiver, a video tape recorder for recording and reproducing video and audio information included in a received television signal and being susceptible to distortion of the recorded video information when sub... | 05/16/1989 |
| 4806931 | Sound pattern discrimination system A system is provided for the detection and recognition of pre-established sound patterns such as the various patterns produced by the sirens of emergency vehicles. The system includes a microprocessor which programmed with pre-established sequence detecti... | 02/21/1989 |
| 4797931 | Audio frequency signal identification apparatus An audio frequency signal identification apparatus of the present invention has a correlator for obtaining the full band power component and autocorrelation coefficients of a digital audio frequency signal to be identified for each analysis time, a plural... | 01/10/1989 |
| 4790014 | Low-pitched sound creator An analog sound signal is outputted. Low-frequency components are selected from the outputted analog sound signal so that a low-pitched sound signal is derived from the analog sound signal. A key of the low-pitched sound signal is lowered so that a very-l... | 12/06/1988 |
| 4785474 | Emergency signal warning system A siren detection system is particularly suited for installation in an automobile for providing a warning to the driver when an emergency vehicle is in the vicinity of the automobile. The system includes a microphone mounted on the automobile. The output ... | 11/15/1988 |
| 4768086 | Color display apparatus for displaying a multi-color visual pattern derived from two audio signals An apparatus is disclosed for displaying two-channel audio input signals in a three-color visual pattern. In general, the visual pattern may be formed on a viewing screen by an apparently moving spot having three color components. Phase shifting means is ... | 08/30/1988 |
| 4759069 | Emergency signal warning system A siren detection system is particularly suited for installation in an automobile for providing a warning to the driver when an emergency vehicle is in the vicinity of the automobile. The system includes a microphone mounted on the automobile. The output ... | 07/19/1988 |
| 4754486 | Motorcycle stereo audio system with VOX intercom An improvement to motorcycle intercom communications between the motorcycle driver and passenger providing for stereo listening in each of both right and left helmet earphones wherein intercom communications may be had through microphones always activated... | 06/28/1988 |
| 4723292 | Voice evacuation system A voice evacuation system using pulse width modulation of square waves at a frequency substantially higher than the voice signals. A number of amplifiers are connected in parallel to the distribution circuit. The signal from each amplifier is examined for... | 02/02/1988 |
| 4712093 | Audible audio level indicator A system for monitoring the level of an intelligence-containing audio frequency signal wherein an operator audibly monitors the signal but cannot adequately monitor a visual level indicator. The system utilizes a threshold detector which compares the leve... | 12/08/1987 |
| 4706289 | Level indicating methods and means A method and apparatus for continuously measuring and indicating the variations of the intensity of an electric signal, such as a signal to be recorded on a tape recorder, which provides measuring to take place at successive measuring periods in such a ma... | 11/10/1987 |
| 4694497 | Automotive multi-speaker audio system with automatic echo-control feature An automotive audio system separates audio signals from an audio signal source into first and second components. The first component of the audio signal is sent directly to a first main amplifier through a first audio signal path and reproduced through a ... | 09/15/1987 |
| 4679042 | Bar/dot level meter A device for providing a visual indication of the value of a variable of an electrical signal has a plurality, n, of driver circuits each having an input terminal for receiving the electrical signal and a plurality, m, of output terminals. Each driver cir... | 07/07/1987 |
| 4612665 | Graphic equalizer with spectrum analyzer and system thereof A graphic equalizer comprises an equalizer for separately level adjusting the input signal for each of a number of divided frequency bands which are different from each other, control knobs provided one for each of the divided frequency bands, which are o... | 09/16/1986 |
| 4581758 | Acoustic direction identification system A system insensitive to nonspeech sounds utilizes a pair of spatially separated microphones to obtain the direction of origin of speech signals from a common sound source. The speech signal from each microphone is transformed into a pulse representative s... | 04/08/1986 |
| 4581759 | Signal delaying device A signal delaying device delays a digital signal corresponding to an audio signal. Input signal data is sequentially written into a memory with regularity and data at an address which was written a predetermined period of time before writing of the presen... | 04/08/1986 |
| 4578665 | Remote controlled surveillance train car A self-propelled remotely controlled satellite car precedes a train along train tracks. The satellite car is remotely controlled to travel a predetermined distance ahead of the train. The satellite car is equipped with a sensor array which measures a vari... | 03/25/1986 |
| 4576178 | Audio signal generator A system is disclosed that includes an audio signal generator to provide a distinguishable audible output that varies in accordance with a monitored input. The audio signal generator varies a parameter of the audible output, such as frequency or amplitude... | 03/18/1986 |
| 4546490 | Single frequency detection circuit A single frequency tone detection circuit for detecting a signalling tone in the presence of guard (i.e. voice) signals on a telephone line. The circuit utilizes a unique arrangement for separating the tone and voice signals by first rectifying and then f... | 10/08/1985 |
| 4542525 | Method and apparatus for classifying audio signals The null transitions of an audio frequency signal are converted by Schmitt trigger circuits, one of which has a small hysteresis range centered on the null value and the other of which has a much larger hysteresis range likewise centered on the null value... | 09/17/1985 |
| 4528501 | Dual loudness meter and method A dual loudness meter and method for simultaneously indicating the apparent loudness of composite audio program material representing peak material or of persistent material employing a first detector means responsive to peak signals for instantaneously i... | 07/09/1985 |
| 4528689 | Sound monitoring apparatus Sound monitoring apparatus is described which provides a slowed down version of the original sound, e.g. a heart beat without changing the quality of the sound as perceived by a trained listener such as a physician. The amount by which the sound is slowed... | 07/09/1985 |
