966 results about "Sound intensity" patented technology

Assembly and method for measuring the concentration of an analyte in a biological matrix. The assembly includes an implantable optical-sensing element that comprises a body, and a membrane mounted on the body in a manner such that the membrane and the body define a cavity. The membrane is permeable to the analyte, but is impermeable to background species in the biological matrix. A refractive element is positioned in the cavity. A light source transmits light of a first intensity onto the refractive element, and a light detector receives light of a second intensity that is reflected from the cavity. A controller device optically coupled to the detector compares the first and second light intensities, and relates the intensities to analyte concentration.

The present invention includes a panel on which a plurality of pixels are located, a light-source for visualizing an image displayed on the plurality of pixels, a controlling circuit for controlling the light-source, and an image-signal tone characteristic controlling circuit. Moreover, the light-source controlling circuit has a function of repeating a period. Here, the period includes a 1st time-period during which an electric current having a 1st intensity is fed to the light-source, and a 2nd time-period during which an electric current having a 2nd intensity differing from the 1st intensity is fed to the light-source. The light-source controlling circuit controls the 1st time-period and the 2nd time-period in accordance with display information. Also, in accordance with the display information as well, the tone characteristic controlling circuit is controlled so that the excellent contrast will be always available.

A lighting fixture having a lamp and alarm clock with a wake-up cycle and sleep cycle with gradually increasing and decreasing light and sounds. The lighting fixture includes at least one lamp for emitting light in the wake-up cycle and in the sleep cycle. The lighting fixture also includes at least one speaker for emitting sound in the wake-up cycle and in the sleep cycle. The lighting fixture further includes a dimmer switch for dimming the light and wake-up cycle control buttons for setting and controlling a wake-up cycle having a light control button for setting the time when the wake-up cycle control buttons activates the light mode and gradually increases the lamp brightness emitted from the at least one lamp; and sound control buttons for setting and controlling the time when the wake-up cycle control buttons activates the sound mode and gradually increases the sound intensity emitted from the at least one speaker; and sound selection switches for selecting one of multiple pre-set sounds for the sound mode of the wake-up cycle, or for full time operation as background sound.

Assembly and method for measuring the concentration of an analyte in a biological matrix. The assembly includes an implantable optical-sensing element that comprises a body, and a membrane mounted on the body in a manner such that the membrane and the body define a cavity. The membrane is permeable to the analyte, but is impermeable to background species in the biological matrix. A refractive, element is positioned in the cavity. A light source transmits light of a first intensity onto the refractive element, and a light detector receives light of a second intensity that is reflected from the cavity. A controller device optically coupled to the detector compares the first and second light intensities, and relates the intensities to analyte concentration.

The present invention includes a panel on which a plurality of pixels are located, a light-source for visualizing an image displayed on the plurality of pixels, a controlling circuit for controlling the light-source, and an image-signal tone characteristic controlling circuit. Moreover, the light-source controlling circuit has a function of repeating a period. Here, the period includes a 1st time-period during which an electric current having a 1st intensity is fed to the light-source, and a 2nd time-period during which an electric current having a 2nd intensity differing from the 1st intensity is fed to the light-source. The light-source controlling circuit controls the 1st time-period and the 2nd time-period in accordance with display information. Also, in accordance with the display information as well, the tone characteristic controlling circuit is controlled so that the excellent contrast will be always available.

The present invention relates generally to a portable / wearable device as well as application or a software program to be downloaded onto a mobile device or computer. The present invention is intended to measure sound intensity / level and provide an alert signal to remind user(s) or crowds (i.e groups of people) that they are speaking too loud or making too much noise. Furthermore, optionally, the device may play a pre-selected music or pre-recorded message when the sound level threshold is exceeded, which can encourage all of the users to use the bio-feedback of the present invention to relax when they see the visual que such as the light color changes, hear the music, message or produced from the device. Another object of the present invention is to help people to know whether his / her voice is loud enough to be heard by people who have hearing impairment.

The invention relates to an abnormal voice monitoring system and method based on an intelligent video. The system comprises a monitoring region field device, an intelligent monitoring and analysis device connected with the monitoring region field device and a monitoring center computer respectively connected with the monitoring region field device and the intelligent monitoring and analysis device, wherein the monitoring region field device comprises a video acquisition module, a voice receiving module triggered by the intelligent monitoring and analysis device and an anti-explosion warning module triggered by the monitoring center computer; and the intelligent monitoring and analysis device comprises a central processor which is respectively connected with the video acquisition module and the voice receiving module and has an output end connected with the monitoring center computer, a data storage module connected with the central processor, a video processing module connected with the central processor and a sound intensity detection module connected with the central processor. The abnormal voice monitoring system and the abnormal voice monitoring method based on the intelligent video have the advantages of relatively high intelligentization, relatively high instantaneity and relatively low false alarm rate.

The invention discloses an intelligent crib based on the Internet of Things. The intelligent crib based on the Internet of Things sends various data to a mobile phone of a guardian through the network, and the guardian can know the condition of a baby by checking information in the mobile phone. The information comprises whether the baby kicks a quilt or wets a bed, whether the body temperature is too high or not is measured; whether the baby cries or not is detected, if the baby cries, the bed is automatically shaken, sleep aiding music is played, and if the baby cries ceaselessly, messages are sent to the guardian to tell the guardian to nurse the baby. The crib further has the functions of heating milk, remotely controlling music playing, preventing thefts, achieving camera shooting and the like. In order to improve the stability of the system, modular design is overall designed in the system, HT32F1656 is adopted as a master control center, a magnetic sensor module, a constant-temperature milk heating module, an infrared temperature sensor, a humidity sensor, a sound intensity sensor, a first pressure sensor, an image collecting module and a WIFI module are controlled and monitored, and the guardian can check the condition of the baby anytime and anywhere.

A music notation system uses a grid with vertical columns representing musical notes and horizontal rows representing time intervals. Each note of a musical piece is indicated by a selected note symbol in the appropriate column, and extending across multiple rows if intended to be sounded for more than one time interval. Different note symbol shapes are used to indicate different tone qualities or playing styles. Note symbols are colored or graphically textured to indicate different sound intensities. Suggested fingerings may be indicated by numbers marked the note symbols, or by lines connecting notes to be played with the same finger. Other graphical design elements may be used to display rhythmic or harmonic context and, in computerized applications, to show or hide selected musical information, or to activate and listen to a sound recording of a piece of music or individually selected notes.

The invention relates an abnormal voice detecting method based on time-domain and frequency-domain analysis. The method includes computing the background sound intensity of a monitored scene updated in real time at first, and detecting and extracting suddenly changed fragments of the sound intensity; then extracting uniform filter Mel frequency cepstrum coefficients of the suddenly changed fragments; and finally using the extracted Mel frequency cepstrum coefficients of sound of the abnormal fragments as observation sequences, inputting a trained modified hidden Markov process model, and analyzing whether the abnormal fragments are abnormal voice or not according to frequency characteristics of voice. Time sequence correlation is improved when the hidden Markov process model is added. The method is combined with time-domain extraction of suddenly changed energy frames and verification within a frequency-domain range, the abnormal voice can be effectively detected, instantaneity is good, noise resistance is high, and robustness is fine.

The invention relates to a method and a device for directionally emitting sound waves with high sound intensity. In the method, an array signal processing circuit is adopted to respectively drive multiple paths of loudspeaker arrays to realize remote directional transmission of the high sound intensity sound waves. Signal processing comprises three processing parts which are frequency division processing, frequency band pre-weighting processing and wave bundle forming processing. Firstly, broadband digital signals are decomposed into a plurality of sub frequency band signals through the frequency division processing; secondly, based on a psychoacoustic mold, each sub frequency band signal subjects to gain adjustment through the frequency band pre-weighting processing according to psychoacoustic parameters; and finally, the phase of input signals of each path of small array is adjusted through the wave bundle forming processing, and output sounds of each path are equidirectionally superposed at a far field position so as to enhance the directivity. In the device, the array signal processing circuit is adopted to respectively drive multiple paths of the loudspeaker arrays and an integral type piezoelectric ceramic transducer array so as to realize the remote and directional transmission of the high sound intensity sound waves.

The invention provides a sound localization-based video monitoring system. In the system, two or more microphones which face towards different directions in a plane or space serve as sound acquisition devices for acquiring sound; relative positions of the respective microphones in the acquisition devices are fixed, and are distinguished by labels; the spatial position of a sound source can be solely confirmed according to the time difference of acquiring the sound of different microphones and the difference of sound intensities; and a camera can be controlled to rotate to find a target and to track and photograph the target according to the position information. As the temperature has an influence on the propagation velocity of the sound, a correction can be provided for the system according to an acquired temperature value, so that the accuracy of the system is improved.

The invention discloses a hydraulic / ultrasonic coupling cavitation device which comprises a hydraulic cavitation mechanism and an ultrasonic functional mechanism, wherein the ultrasonic functional mechanism is arranged on the hydraulic cavitation mechanism; the ultrasonic functional mechanism comprises an ultrasonic transducer, a connecting flange, an amplitude transformer and a functional fixture, wherein the ultrasonic transducer is connected with the amplitude transformer through the connecting flange, the amplitude transformer is connected with the functional fixture, and the hydraulic cavitation mechanism is arranged in the functional fixture and can be a Venturi tube, a pore plate or a liquid nozzle. The invention has the advantages that: an electric ultrasonic cavitation device is combined with the hydraulic cavitation device, and the coupling synergistic effect of the ultrasonic cavitation and the hydraulic cavitation can greatly enhance the cavitation effect to ensure that cavitation energy, sound pressure, sound intensity and efficiency are greatly improved. The hydraulic / ultrasonic coupling cavitation device can be effectively used in industrial production processes of sewage degradation treatment, oil water demulsification treatment, liquid inactivation treatment, Chinese medicine extraction, induced crystallization, wine ageing treatment, material uniform dispersing treatment, and the like.

The invention discloses a double-frequency ultrasonic multi-dimensional focused noninvasive cerebrovascular thrombolytic system, which is characterized in that: a craniocerebral vertical positioning ring is worn for image detection and acquisition of positioning image data; the position and treatment position of a focus can be determined by using a medical image three-dimensional reconstruction technique; a multi-dimensional low-power low-frequency ultrasonic transducer is placed on the same cut face of a focus of cerebral embolism to form a stable ultrasonic cavitation effect is formed in the thrombus or the focus of the cerebral embolism; a medium-frequency and / or high-frequency focused ultrasound transducer is used to radiate the thrombus by a focused ultrasonic focal point from a position on the same cut face of body surface which is most close to the focus, the focused ultrasonic waves are focused with high power, high sound intensity and high accuracy and are intermittently emitted in a pulse modulation ultrasonic wave mode in a short time to form an instant unstable ultrasonic cavitation effect in the thrombus to induce blasting in the thrombus, so that the thrombus is disintegrated and dissolved quickly; and while the thrombus is quickly and effectively dissolved, the inner wall of the blood vessel and surrounding normal brain tissues are not damaged, so in-vitro noninvasive thrombolytic effect is achieved.

A personal care device having a handle having an engagement portion and a persona care attachment are described. The personal care attachment has a housing attached to the engagement portion and a contact element carrier. The contact element carrier is movably coupled to the housing. A plurality of contact elements is arranged on the contact element carrier, and wherein the personal care attachment is driven at a frequency of between about 150 Hz to about 175 Hz and has a sound intensity level of less than about 75 dB(A).

Method and apparatus for simultaneous acoustic measurement at a point (M) in space of the three components of the sound intensity vector. A preferred omnidirectional vector probe (40) includes a central ring (42) with four small, microphones on tubes attached to the ring spaced from one another in a regular tetrahedral arrangement. The tubes are parallel to the axis of the ring, two on one side (58) and two on the reverse side (60) of the ring, with two of the microphones pointing in one direction and two in the opposite direction. The microphone signals are processed by an analog-to-digital converter feeding a digital signal processor (68) and employing a cross-spectral formulation to compute a sound intensity vector at the measurement point (M). Sound velocity and pressure can also be determined at this point. The resulting data may be outputted on a computer screen or other device (70). Additional related features and methods are disclosed.

The invention relates to a design method of a music color lamp controller based on rhythm following. A music rhythm extraction algorithm based on waveform energy variation characteristic detection is employed and an acoustic characteristic and color lamp space mapping relation model is employed to process the audio signal, a music rhythm detection effect is achieved through a short-time energy extreme value judgment, and the time point information of a music rhythm is achieved. At the time point of music rhythm appearance, the short-time signal of the time point is subjected to spectrum analysis and processing, real-time acoustic energy and frequency domain characteristic parameters are obtained in real time, the mapping relation models of pitch and color domain, timbre and saturation, and sound intensity and brightness are established, a color lamp color is changed as a color obtained by the frequency domain information conversion of an audio waveform at the point, and the color lamp color change and music rhythm change synchronization is realized. According to the method, a color gradient mechanism is adopted in color lamp driving, and the soft change of a light effect is realized.

The invention aims at providing a sound field rebuilding method. The sound field rebuilding method comprises the following steps that firstly, a sound pressure value of a measuring face in a measuring sound field is measured; secondly, different sound sources are endowed with a certain weight through the centroid method according to the actual positions of the sound sources and the sound intensity, the positions and number of multi-ball virtual source intensities and the position coordinates of each virtual ball are calculated; thirdly, zero filling expanding is carried out on the measured sound pressure value of the measuring face to obtain the sound pressure value of an expanding face of the measuring face; fourthly, a transfer matrix between the sound pressure value of the expanding face of the measuring face and the virtual ball sound pressure is calculated; fifthly, a transfer matrix between the sound pressure value of a rebuilding face and the sound pressure value of the multi-ball virtual equivalent source intensities is built; sixthly, the transfer matrix obtained in the fourth step and the transfer matrix obtained in the fifth step are combined, and the sound pressure value of the rebuilding face is obtained. According to the sound field rebuilding method, multi-ball region two-dimensional fast Fourier conversion algorithm is introduced, a virtual source intensities configuration and the measuring face do not need to be conformal, and the calculation efficiency and calculation precision are very high.

A method and apparatus are disclosed for monitoring and assessing the occurrences of a person's snoring activity. Being small and portable, the apparatus is easily attached to a subject and detects and quantifies the subject's snoring behavior. It automatically provides an immediate display of the average number of snores per hour (i.e., a “snore index”) and an indication of the sound intensity of these snores, which are measures of the subject's snoring activity. In a preferred embodiment, this apparatus includes: (a) a sensor to capture the temporal variation of a subject's snoring activity, (b) an analog to digital converter to sample and digitize the captured data, (c) a microprocessor to process the digital data and control the apparatus' operation, (d) a memory device for data storage, (e) a display means, and (f) an embedded firmware program that controls the: (i) sampling and storage of the data, (ii) analysis of the data to compute the average number of snores per hour and their intensity, and (iii) the operation of the display means and the possible downloading of the data.

The invention provides an ultrasonic processing device with high sound intensity, which is used for grain refining, degassing and ingredient homogenization when the metal and the alloy are solidified and comprises an ultrasonic generator, a transducer, an amplitude variable rod and a coupling head; wherein, the ultrasonic generator comprises a frequency phase locking tracking module, which is used for automatically carrying out tracking and detection to working frequency of the ultrasonic generator and adjusting matching frequency. By adopting the frequency phase locking tracking module, the decrease and drift problems of frequency are solved and even in different high-temperature melts, the ultrasonic effect same as that of starting at rated frequency can also be obtained, thus realizing grain refining, degassing and ingredient homogenization when the metal and the alloy are solidified.

The invention relates to a method for testing the sound absorbing performance of a material, which are used for solving the problem of the limit of the test condition on the test result caused by the large size of the conventional device for testing the sound absorbing performance of a material. The device comprises a sound source system and a sound intensity test system, wherein the sound source system consists of a signal generator, a power amplifier and a loudspeaker, and is used for generating a sound signal for testing; and the measuring system consists of a sensor and a data acquisition unit, and is used for acquiring test data and computing a test result. The method comprises the following step of: calculating the sound absorbing coefficients of a test piece by testing the sound absorbing amounts A2 and A1 in the presence and absence of the test piece. The method is suitable for testing the sound absorbing performance of a material.

The invention discloses an audio processing system and method for mobile terminals. The system comprises a first processing module, a judgment module and a second processing module, wherein the first processing module is used for carrying out low-frequency cutting operation on a received audio signal; the judgment module is used for making judgment according to the sound intensity of the audio signal, wherein the audio signal is judged as an effective signal if the sound intensity of the audio signal is greater than a preset threshold, and the audio signal is judged as ineffective signal if the sound intensity of the audio signal is lower than the preset threshold; and the second processing module is used for enhancing the volume of the effective signal according to a preset proportion and decreasing the volume of the ineffective signal according to a preset proportion or completely cutting the ineffective signal. According to the invention, the tone quality of records can be effectively improved, and tones become clear and full.

The invention discloses a speech similarity detection method. The method comprises: collecting audio frequency data of a speech; extracting audio frequency feature parameters, including a frequency spectrum coefficient and a sound intensity, from the audio data; and comparing the audio frequency feature parameters with re-extracted audio frequency feature parameters of an original audio unit to obtain a similarity degree between the speech and the original audio unit. Correspondingly, the invention also discloses a speech similarity detection apparatus. Therefore, the accuracy of speech similarity detection can be improved.

A personal care device having a handle having an engagement portion and a persona care attachment are described. The personal care attachment has a housing attached to the engagement portion and a contact element carrier. The contact element carrier is movably coupled to the housing. A plurality of contact elements is arranged on the contact element carrier, and wherein the personal care attachment is driven at a frequency of between about 150 Hz to about 175 Hz and has a sound intensity level of less than about 75 dB(A).