193 results about "Acoustic processing" patented technology

A cooled acoustic liner useful in a fluid handling duct includes a resonator chamber 52 with a neck 56, a face sheet 86, and a coolant plenum 80 residing between the face sheet and the chamber. Coolant bypasses the resonator chamber, rather than flowing through it, resulting in better acoustic admittance than in liners in which coolant flows through the resonator chamber and neck. In one embodiment, the liner also includes a graze shield 88. Openings 40, 38 penetrate both the face sheet and the shield to establish a relatively low face sheet porosity and a relatively high shield porosity. The shielded embodiment of the invention helps prevent a loss of acoustic admittance due to fluid grazing past the liner. Another embodiment that is not necessarily cooled, includes the resonator chamber, low porosity face sheet and high porosity shield, but no coolant plenum for bypassing coolant around the resonator chamber. An associated method of retrofitting an acoustic treatment into a fluid handling module includes installing openings in the module and mounting a resonator box 44 on the module so that the inlets to the resonator necks register with the installed openings.

A method and system for acoustic treatment performance testing in a free-field acoustic environment is provided. A sound source directs a gated acoustic pulse at an acoustic treatment. Acoustic pressures of the gated acoustic pulse and reflected energy from the acoustic treatment are measured from a location approximately in-line with the source and the acoustic treatment. This measurement location is at least one-half the wavelength of the frequency of interest away from the source and is at least a distance equal to (t*c / 2) away from the acoustic treatment where t is equal to the duration of the gated acoustic pulse and c is equal to the speed of sound in the free-field acoustic environment. The acoustic pressures of the gated acoustic pulse and reflected energy are compared as an indication of performance of the acoustic treatment at a frequency of interest.

Combination light diffusion with either sound diffusion or absorption is provided in a single lighting fixture, to provide uniform luminosity and sound control. The traditional flat light diffuser is replaced with a translucent acoustical element which either diffuses sound or absorbs the sound. The sound diffuser topology includes random surfaces, geometrical shapes, number theoretic diffusers or optimized rectilinear or curvilinear surfaces. The translucent sound absorber includes microperforated or microslit panels, as well as translucent fabrics and microperforated, translucent wood veneers.

In a terminal, acoustic information input by an acoustic input unit is analyzed by an acoustic processor to acquire multi-dimensional feature quantity parameters. In an initial setup process, a speech communication information generator on the terminal generates a processing condition (clustering result table) for compression-encoding on the basis of the multi-dimensional feature quantity parameters, and stores the condition in speech communication information holding units of the terminal and a server. In a speech recognition process, the terminal encodes acoustic information using the processing condition, and sends encoded data to the server. The server decodes the encoded data using the processing condition, and executes speech recognition. In this way, appropriate encoding can be achieved in accordance with a change in acoustic feature, and the recognition rate and compression ratio upon encoding can be prevented from lowering due to a change in environmental noise.

An acoustic, noise-attenuating panel for an aircraft engine nacelle inlet. The panel includes at least three layers: (a) a perforated film; (b) a sound attenuating core; and (c) a structural layer. The structural layer has through-holes adapted for receiving fasteners that are configured to engage structure of an engine nacelle. The structural layer is fabricated, at least at its ends, of a material sufficiently strong so that when fasteners are engaged in the through-holes in the layer's ends, the fasteners retain the acoustic panel in a nacelle inlet under conditions of use. Alternatively, or in addition, the structural layer ends may be reinforced at the through-holes with reinforcing strips.

In the voice synthesizer, which obtains a voice by emphasizing a specific part of a sentence, an emphasis degree deciding unit extracts a word or a collocation to be emphasized from among respective words or respective collocations on the basis of an extracting reference with respect to the each word or the each collocation included in a sentence and deciding an emphasis degree of the extracted word or the extracted collocation. An acoustic processing unit synthesizes a voice having an emphasis degree that is decided by the emphasis degree deciding unit provided to the word to be emphasized or the collocation to be emphasized. Whereby the emphasized part of the word or the collocation can be obtained automatically on the basis of the extracting reference such as a frequency of appearance and a level of importance of the word or the collocation, further, improves an operation-ability.

A system and method for classifying a voice signal to one of a set of predefined categories, based upon a statistical analysis of features extracted from the voice signal. The system includes an acoustic processor and a classifier. The acoustic processor extracts features that are characteristic of the voice signal and generates feature vectors using the extracted spectral features. The classifier uses the feature vectors to compute the probability that the voice signal belongs to each of the predefined categories and classifies the voice signal to a predefined category that is associated with the highest probability.

The embodiment of the invention discloses a method of processing telepresence conference user signals, which comprises: getting the signing in information of telepresence conference place and recognizing the free subscriber area according to the signing in information of users; making sure the signals from the free subscriber area are invalid signals and the signals from the other subscriber areas are valid signals. The invention also provides device and system thereof. According to the invention, in telepresence applied occasions, attending situation of users in each subscriber area can be recognized according to the simple and convenient signing in device arranged on the terminal side. And according to the information, in the processes of video switching, screen composing and acoustic processing, the invalid video and audio code stream can be effectively and automatically wiped off so as to improve the performance, efficiency and usability of conference system.

Sound delivery system (10) stimulates the two hemispheres of the brain separately by delivering different vibro-acoustic vibrations to the left and right sides of a person's body. Split resonator (30) includes left resonator member (32L) with attached left transducer (23) and right resonator member (32R) with attached right transducer (24). Left and right resonator members are spaced apart to prevent vibrations being transmitted between resonator members.

Herein disclosed is a sound signal processing apparatus ( 10 ), comprising: a speaker unit ( 12 ) for converting a first sound signal to a first sound; sound signal producing means ( 13 ) for producing a second sound signal constituted by at least two different components including an echo component indicative of the sound outputted by the speaker unit ( 12 ), and a voice component indicative of one's voice having a least one leading end; echo component suppressing means ( 14 ) for suppressing the echo component of the second sound signal on the basis of the first and second sound signals to output, as a third sound signal, the suppressed second sound signal; sound signal storing means ( 15 ) for storing the third sound signal outputted by the echo component suppressing means ( 14 ); voice detecting means ( 16 ) for detecting the leading end of the speaker's voice on the basis of the third sound signal outputted by the echo component suppressing means ( 14 ); and controlling means ( 17 ) for controlling the sound signal storing means ( 15 ) to have the sound signal storing means ( 15 ) output, as a fourth sound signal, said third sound signal stored in the time period when said voice is detected on the basis of said third sound signal outputted by said echo component suppressing means, the controlling means ( 17 ) being operative to specify two different clock times on the basis of a predetermined time difference, the clock times including a first clock time at which the leading end of the voice is detected by the voice detecting means ( 16 ), and a second clock time prior to the first clock time, the controlling means ( 17 ) being operative to have the sound signal storing means ( 15 ) start to output the third sound signal stored after the second clock time.

An aircraft nacelle includes an air intake that makes it possible to channel the air in a pipe in the direction of a pipe of a power plant that is arranged in the extension of the pipe, whereby the pipe of the air intake includes at least one panel that integrates an acoustic treatment with an acoustically resistive porous layer that is in contact with the aerodynamic stream that enters into the nacelle, at least one alveolar structure, and a reflective or impermeable layer that forms the rear surface of the panel, a flange that ensures the connection between the air intake and the power plant including at least one wing that is connected to the air intake by a number of connecting elements, characterized in that some of the connecting elements have axes that are secant with the edge of the panel that delimits the pipe of the air intake.

A system for cleaning an object may include an acoustic device configured to deliver acoustic waves to the object, a cleaning medium dispenser configured to deliver a cleaning medium to a surface of the object, a rinsing medium dispenser configured to deliver a rinsing medium to the surface, a vacuum configured to deliver a vacuum airflow proximate the surface, wherein the acoustic waves generate acoustic vibrations in the object to dislodge debris from the surface, acoustically treat the cleaning medium and the rinsing medium, and atomize the cleaning medium, the debris collected by the cleaning medium and the rinsing medium.

An acoustic processing system for an electronic device includes: an equalizer processor which boosts or cuts a digital signal which has been subjected to an acoustic process for each of frequency components; a low-pass filter which extracts a low-range signal from the signal from the equalizer processor and outputs the signal; a high-pass filter which extracts a high-range signal from the signal from the equalizer processor and outputs the signal; a high-range compressor which compresses the high-range signal; an adder which adds the low-range signal and the compressed high-range signal; and aspeaker which outputs an acoustic sound in accordance with the signal after the addition.