361 results about "Acoustic effect" patented technology

The present invention relates to a non-invasive device for measuring physiological processes. More particularly, it concerns a device that can be applied externally to the body of an animal or human to detect and quantify displacement, force, motion, vibration and acoustic effects resulting from internal biological functions. Specifically, an inexpensive device is disclosed that is compact, light, portable and comfortable, and operates satisfactorily even with imprecise location on the body, ambient noise, motion and light.

A finite element model of an ear stored on a computer readable medium having logic representing a three-dimensional geometric model of the ear; logic for meshing individual anatomical structures of the ear accounting for whether the anatomical structures include at least one of air, liquid material and solid material; logic for assigning material properties for each anatomical structure based on at least one physical property of each anatomical structure; logic for assigning boundary conditions for some of the anatomical structures indicative of interaction between such anatomical structures; and logic for employing acoustic-structural coupled analysis to the anatomical structures of the ear to generate data indicative of the acoustic effect on mechanical vibration transmission in the ear. Various embodiments of “one-chamber” and “two-chamber” analyses and models are described.

The invention discloses a virtual performing system, which comprises the following subsystems: space designing subsystem, garment modeling designing subsystem, figure movement designing subsystem, light designing subsystem, specially good effect designing subsystem, acoustic effect designing subsystem, wherein these subsystems are mated to analog and set and replay project or performance, which display entire effect with less labor and cost. The invention is convenient to operate for multiple users simultaneously, which can rapidly finish analoging.

The invention discloses a wearable virtual reality motion helmet and a wearable virtual action game system. The helmet comprises a three-dimensional image display screen, a sound player, a sensing unit, a vibration component, a process control unit running a three-dimensional virtual game, and a data transceiving unit. An enclosed virtual simulated visual and acoustic effect can be generated; and the viewing angle of the game scene can be changed by the turning and the direction change of the head. The helmet can be used in combination with auxiliary terminals such as a game gun, a gamepad, a sport jacket, game gloves, a treadmill and / or sport shoes, to make the human-machine interaction and the network competition of virtual games such as simulated gunnery, simulated driving, simulated outdoor live CS become easier; and real-time bidirectional information exchange can be achieved among the helmet, the auxiliary terminals and the network; the verisimilitude is enhanced by the vibration feedback, such as the vibration feeling like being really shot in shooting game competitions, thereby achieving the 5D interaction.

The method determines parameters to generate confocal ultrasound beams (B1,B2) inside a medium (4), and uses a device (1) comprising first and second ultrasound means (11,12) and first and second displacement members (13,14) for moving the ultrasound means (11,12). The parameters include signals s1,s2 to the ultrasound means (11,12), and the positions x1,x2 of the ultrasound means (11,12). The parameters are optimized for having a minimum amplitude a1,a2 of the signals s1,s2 and having an acoustic effect inside the medium (4).

A high pass filter 32 having a cut-off frequency of 200 Hz and a cut-off response of +12 dB / OCT and a low pass filter 33 having a cut-off frequency of 400 Hz and a cut-off response steeper than −24 dB / OCT are used to pick out components in a double overtone region of 200˜400 Hz of a bass musical instrument such as a base or a bass drum from an input audio signal. The component which is picked out is input to distortion applying means 34 having an input-output response which is a non-linear response having no point symmetry with respect to 0 point, thus applying a distortion to cause even-numbered overtone components to be produced. An output from the distortion applying means 34 and the input audio signal are summed in a summer 18 to be delivered. Natural tones which have boosted bass tones and which are free from impurity are obtained.

The invention discloses a 3D sound effect processing method, device, and system and a sound system. The method comprises steps of: for 3D sound effect audiences, determining a corresponding relation between the sound effects of sounding devices in the sound system in the 3D sound effect and sound sources in a virtual reality scene; determining the audience positions of the 3D sound effect audiences in the a virtual reality scene and the sound source positions of sound sources be to sound in the virtual reality scene; determining a positional relation between the audience positions and the sound source positions; instructing, according to the position relation and the corresponding relation, the sounding devices in the sound system to give sound effects. The method, device, and system provide users with strong sense of reality and enhance user experience. Especially when the sound effect of an external sound system changes with a virtual scene and corresponds to the distance change in the scene, the sense of reality of the sound and the user experience can be further enhanced.

The invention relates to a building material as well as the manufacturing method thereof, in particular to a glass fiber reinforced gypsum board as well as the manufacturing method thereof. The glass fiber reinforced gypsum board comprises the components by weight parts as follows: 100 parts of high strength gypsum powder, 5 or more than 5 parts of glass fiber choppedstrand mat and glass fiber lattice cloth, (0.2 to 0.5) percent of water reducing agent, (0.1 to 0.5) percent of retarder and 30 to 33 parts of water. The manufacturing method comprises the following steps in sequence: batching, slurry-mixing, mould-entering and casting, finished-product knockout, dehydration and drying as well as shaping and cleaning. The glass fiber reinforced gypsum board has the advantages that the distortion is small, the dry / wet shrinkage rate is low, the strength is high, the weight is light, no odor exists, the board can be degraded for regeneration and utilization, the acoustic effect is good, the material surface is fine and clean, the reinforced gypsum board also has fireproof performance, and meanwhile, the manufacturing process is simple, the construction period is short, and the manufacturing cost is low.

A hybrid catheter device for performing cutting action on a region of a tissue, using sequential laser and mechanical cutting processes, and incorporating an acoustic sensor on the end of the device, such that if a pulsed laser beam is used for the laser cutting, the absorption of that beam in the tissue being cut can provide information about the progress of the cut by means of the opto-acoustic effect. Other hybrid catheter devices incorporate blunt protrusions on the end of said device, but having sharp lateral edges, such that rotation of the catheter device generates mechanical cutting action in the tissue. The blunt protrusion ends prevents uncontrolled cutting in the forward motion. Other hybrid catheter devices enable controlled incisions into an organ wall, such as the duodenum, and held in place by means of an inflatable balloon. A dual-wavelength nail fungus treatment hybrid catheter is also shown.

A rainfall simulation apparatus for a structure is provided, comprising a water source, an electric pump, a vertically oriented riser pipe, a perforated header pipe along the roof of the structure, a V-shaped aperture-containing trough connected to the roof, and an elongated collection bin below the trough and connected to the pump. The rainfall simulation apparatus has particular utility in connection with providing the relaxing acoustic effect of rainfall on a structure while additionally providing the visual effect of rainfall through the windows of the structure.

The percussion resonance system allows a drummer to produce additional, resonant acoustic effects beyond those produced by a conventional drum or other percussion instrument. In one embodiment, the percussion resonance system includes a substantially cylindrical sidewall having opposed upper and lower open ends, similar to the sidewall of a conventional drum, and batter and resonant heads respectively covering the upper and lower ends of the substantially cylindrical sidewall. A plurality of apertures are formed through either the batter head, the resonant head, or both, in order to produce additional acoustic effects caused by the air passing through the apertures as the heads vibrate. Air passing through the apertures increases the overall tonal qualities of the percussion instrument, and further aids in decreasing generation of unwanted vibrations, particularly in the form of ringing sounds or overtones. Further embodiments include inserts for percussion instruments having surfaces with similar apertures formed therethrough.

To provide a three-dimensional acoustic effect to a listener in a reproduction field, via a headphone in particular, a three-dimensional acoustic apparatus is formed by a linear synthesis filter having filter coefficients that are the linear predictive coefficients obtained by performing a linear predictive analysis on an impulse response which represents the acoustic characteristics to be added to the original signal to achieve this effect. By passing the signal through this acoustic characteristics adding filter, the desired acoustic characteristics are added to the original signal, and by dividing the power spectrum of the impulse response of these acoustic characteristics into critical bandwidths and performing this linear predictive analysis based on impulse signal determined based from power spectrum signals representing the signal sound of each of these critical bandwidths, the filter coefficients of the linear synthesis filter are determined.

A method, apparatus, and system (48) are disclosed for use in synthesizing an audio performance (50) in which one or more acoustic characteristics, such as acoustic space, microphone modeling and placement, can selectively be varied. In order to reduce processing time, the system utilizes pseudo-convolution processing techniques (54) at a greatly reduced processor load. The system is able to emulate the audio output in different acoustic spaces, separate musical sources (instruments and other sound sources) from musical context; interactively recombine (56) musical source and musical context with relatively accurate acoustical integrity, including surround sound contexts, emulate microphone models and microphone placement, create acoustic effects, such as reverberation (58), emulate instrument body resonance and interactively switch emulated instrument bodies on a given musical instrument.

To provide a three-dimensional acoustic effect to a listener in a reproduction field, via a headphone in particular, a three-dimensional acoustic apparatus is formed by a linear synthesis filter having filter coefficients that are the linear predictive coefficients obtained by performing a linear predictive analysis on an impulse response which represents the acoustic characteristics to be added to the original signal to achieve this effect. By passing the signal through this acoustic characteristics adding filter, the desired acoustic characteristics are added to the original signal, and by dividing the power spectrum of the impulse response of these acoustic characteristics into critical bandwidths and performing this linear predictive analysis based on impulse signal determined based from power spectrum signals representing the signal sound of each of these critical bandwidths, the filter coefficients of the linear synthesis filter are determined.

A hearing aid is provided that avoids disturbing acoustic effects caused by on, off, or switchover events. The signal processing in the hearing aid is switched in sliding fashion from a first operating condition into a second operating condition. According to the invention, both operating conditions are simultaneously present in the hearing aid during the switching event. The sliding transition ensues by a parallel signal processing in at least two signal paths of the hearing aid, whereby a signal that results from the first operating condition and a signal that results from the second operating condition are added in changing weighting.

A method for survey data processing compensates for visco-acoustic effects in TTI medium in an RTM method. This method employs propagating in conjugate medium to yield correct phase, and acoustic wave propagation to yield correct amplitudes through adaptive matching filtering.

A system and method of predicting multi-dimensional meteorological and acoustic effects within and above a forest environment comprises collecting input data comprising meteorological and forest canopy characterization data for a specified forest environment; inputting the input data into program meteorology modules comprising an embedded radiative transfer and energy budget methodology module adapted to predict a heat source within and above the forest environment for any location at any time; calculating an incoming total radiation at a top of the forest environment; outputting multi-dimensional acoustics and meteorology numerical codes based on the program meteorology modules and the calculated total radiation; and formulating sound speeds within and above the forest environment based on the numerical codes.

The invention relates to the field of home audios, in particular to a method for automatically adjusting the sound direction and time delay of an audible device and achieving the best sound effects. The method includes the steps: recognizing a user position, adjusting directions of loudspeakers and enabling a sound output direction to directly face a target user; measuring the distance between each loudspeaker and a user, adjusting the sound time delay of the loudspeakers and enabling sound of each loudspeaker to simultaneously reach the user. By the steps, the sound direction and the time delay of the loudspeakers are automatically adjusted to achieve the best sound effects.

An electronic apparatus housing cover is adapted to be attached to a housing of an electronic apparatus having a connection terminal to be connected to an external apparatus via a connecting cable, and a speaker device adapted to output a sound, and cover the connection terminal and the speaker device. The housing cover includes a cover main body having a box like shape, having an opening on a face opposed to the housing, and having an insertion passage section through which the connecting cable is inserted, and an acoustic effect section provided to the cover main body, and adapted to execute an acoustic effect processing on a sound output from the speaker device.

An acoustic effect impartment apparatus detects striking of any one of strings by a corresponding hammer in an acoustic piano like a grand piano, and vibrates a vibration section with a driving waveform signal obtained by synthesizing sine wave signals of the fundamental frequency and harmonic frequency of the hammer-struck string. Such vibration of the vibration section is transmitted to the keys via a soundboard and bridge of the piano. Thus, vibration is excited in the hammer-struck string by the striking with the hammer but also by the driving waveform signal, so that an acoustic effect corresponding to the driving waveform signal is imparted. Because the driving waveform signal is a simple signal using the sine wave signals corresponding to the fundamental frequency of the string, a natural feeling of the acoustic piano will not be lost even when the acoustic effect is imparted.

The invention relates to a device and a method for a plurality of sound sources to share an audio power amplifier on the same terminal, which solves the technical problems of great software complexity, high hardware cost and power consumption in the plan that a plurality of sound sources share one audio power amplifier. The core idea of the invention is that a feedback circuit of the audio power amplifier can adopt an adjustable digital potentiometer, and a baseband processor adjusts the digital potentiometer according to the different sound sources characteristics to achieve the purpose of adjusting the gain value of the audio power amplifier. The invention provides a thorough solution to the volume differences between different sound sources caused by the hardware and signal characteristics, thus improving the acoustic effects.

A channel conversion part (214) performs channel conversion on audio data of a plurality of channels so that the number of channels thereof is converted to an appropriate number of channels for which an acoustic effect can be verified or perceived by audience according to the volume level of reproduced sound, and audio is output only with a required number of channels. In addition, a frequency control part (215) for controlling the operating frequencies of switching regulators (220-223) of audio amplifiers (224-227) also performs frequency control according to the volume level of sound of each channel which performs an audio output.

In a conventional hard material insulator, reproduced sound can be tuned with use of characteristics of the material; however, various types of acoustic materials have specific high frequency characteristics, and thus their acoustic effects lack versatility, require compatible audio devices, and change with environment, musical genre, etc. To address this, a wind-bell member (resonant member) is arranged in parallel with a main propagation path of vibration transferred from an audio device to an insulator. Accordingly, a vibration system of a wind-bell having a tone determined by many factors such as a fundamental tone, harmonic tones, lingering sound, and fluctuation assists (enhances) high frequency vibration propagated from the audio device. As a result, due to the above assist action that is different in principle from a conventional type, acoustic characteristics such as a sense of localization, resolution, and a sense of transparency and scale a sound image can be dramatically improved.

The invention discloses an automatic volume adjusting earphone, comprising an audio signal input unit, a loudspeaker, a microphone, an accessible memory and an arithmetic unit, wherein the audio signal input unit outputs a test audio signal, the loudspeaker receives the test audio signal and generates sound, the microphone receives the sound in antrum auris of human body and outputs a comparison audio signal, the accessible memory accesses the comparison audio signal, the arithmetic unit performs arithmetic processing according to the comparison audio signal to obtain a frequency requiring strengthening, the output audio signal and the frequency requiring strengthening are subjected to arithmetic strengthening and then input to the loudspeaker through the audio signal input unit. The automatic volume adjusting earphone of the invention can show the best acoustic effect to the antrum auris of different users. The invention also discloses an earphone volume adjusting method.

The invention discloses a broadband air noise energy collection surface material comprising at least two unit bodies in periodic arrangement; the unit body comprises two Helmholtz resonators with different trunnion radius and a same dimension cavity and arranged side by side, wherein two cavities are separated by a copper sheet; two piezoelectric ceramics are arranged in one of the two cavities, and arranged on the copper sheet. The broadband air noise energy collection surface material can control phase shift formed in the resonance frequency portion, can form coupling resonance with anti-phase in the structure, thus realizing broadband high efficiency sound electric energy collection. The material utilizes the resonance acoustics effect; the thickness of the structure is only 1 / 27 of thewavelength corresponding to the highest work sound wave frequency, thus providing ultrathin effects; the structure introduces symmetry, so the voltage outputted by each acoustical-electrical transducer in the structure has high cophasal features; compared with a conventional method, the circuit complexity can be simplified in a cascade process, thus improving stability.

The invention relates to the field of automobile audio, and discloses an automobile audio control method and an automobile audio control system. The automobile audio control method comprises the following steps: detecting the number and sitting positions of passengers on seats through pressure sensors below the seats; and automatically adjusting the sound field center of the automobile audio according to the detected number and sitting positions of the passengers. By adopting the automobile audio control method and the automobile audio control system, the automobile audio effect and the operation convenience can be effectively improved, and meanwhile the driving security can be improved.

An apparatus for determining a position estimate for an audio source comprises two microphones (M1, M2) and an acoustic element (203) providing an acoustic effect to sound from sound source positions to the first microphone (M1). The acoustic effect is asymmetric with respect to an axis (201) between the microphones (M1, M2). A position circuit (305) estimates two possible positions on different sides of the axis for the sound source in response to time of arrivals at the microphones (M1, M2). An estimator (307) determines an acoustic effect measure being indicative of a degree to which an acoustic effect of the first microphone signal matches an expected characteristic of the acoustic effect for sound sources on one side of the axis (201). Another circuit (309) determines the position estimate by selecting between the two possible positions in response to the acoustic effect measure. The approach may resolve ambiguities in position determination associated with position determination based on time of arrival at two microphones.

The present invention discloses an information processing method applied in an electronic device and is used for solving the technical problem in the prior art that the electronic device can not perform smart play of music according to a music style. The method comprises: when an audio file is going to be played, acquiring first information corresponding to the audio file; according to the correspondence between information and an acoustic effect mode, determining a first acoustic effect mode corresponding to the first information; and playing the audio file in the first acoustic effect mode. The present invention also discloses the corresponding electronic device.

A real-time optico-acoustic imaging method based on acoustic lens and polarization detection is disclosed. The acoustic lens is used to generate the acoustic pressure distribution of biologic tissue duto optico-acoustic effect and couple it to an imaging plane for directly imaging on it. A polarization analyzing method is used to convert said acoustic pressure distribution to light intensity distribution, which is recorded by CCD to obtain a clear image of a tissue layer. Its apparatus is composed of transparent flexible rubber layer, optical fiber, acoustic lens, laser, 1 / 4 wave plate, polarization analyzer, CCD, computer, and cylindrical cavity made of aluminum.