Acoustical Patents for Sale or License

Stroboscope Light for Subwoofers and Low Frequency Speakers

This is a brand new invention illuminating subwoofer speaker and allowing the spectator to see the rhythm and customizable speaker movement! The device is used to illuminate the subwoofer in an (car) audio system. By analyzing audio signal it enhances the visual rhythm of the speaker and could be used to create abnormal speaker movement illusion. Spectacular 3D moving images, created on the membrane of a woofer will leave no indifferent observers and will heavily contribute to the appearance
...

Active Wound Healing Film for Eardrum Perforations

The invention relates to a film for closing a perforation of the eardrum, which comprises a positioning element, which is disposed in the outer ear channel, and a closure element, which consists of a flexible material, which can be resorbed, wherein said closure element is implemented as a spiral at least in its interior and contains micro-cavities and an electrode array on the side in contact with the eardrum. The object of the invention is also a method for closing a perforation of the eardrum
...

Method for speech recognition in patients with neurological disorder or laryngectomy for e.g. vocal rehabilitation, involves acoustically reproducing output signal and/or converting signal into writte

The method involves receiving noise, which is generated in an oral cavity (6) of patients, during articulation of speech of the patients. An input signal is subjected in a digital form in a signal processing device for detecting linguistic patterns. The detected patterns are converted to an output signal by speech synthesis, where the output signal corresponds to natural or simulated articulated speaking voice. The output signal is acoustically reproduced and/or converted into a written text ref
...

Methods and Apparatuses for Generating a Steerable Pressure Field in a Shock Wave Lithotripter

Lithotripter apparatuses and methods are provided for selectively modifying an acoustic pressure field and can include a shock wave source operable to generate a shock wave having a substantially axisymmetric acoustic pressure field, an acoustic focusing member positioned between the shock wave source and a target, and an acoustic barrier positioned between the shock wave source and the acoustic focusing member. The acoustic barrier can be operable to selectively block a portion of the shock wav
...

Acoustic Lens for Shockwave Lithotripsy and Related Methods

Systems and methods for providing therapeutic shock waves are provided. A modified acoustic lens can include a first lens portion for directing a first part of an acoustic shock wave pulse toward a target and a second lens portion for directing a second part of the acoustic shock wave pulse toward the target. The second lens portion can be offset relative to the first portion such that transmission of the second part of the acoustic shock wave pulse through the second lens portion is delayed by
...

Simultaneous sample manipulation and sensing using surface acoustic waves

The present invention provides a hexagonal, delay line surface acoustic wave device fabricated on a a piezoelectric substrate, such as lithium tantalate, coated with an insulating waveguide on to which a sensing film, such as an anti-human Interleukin-6 biosensor film, is physically absorbed. The acoustic waves that propagate along the delay lines of the SAW device provide for detection of biological species along one delay line and simultaneously provide for removal of non-specifically bound pr
...

Method of Modifying the Frequency Response of a Wooden Article

Disclosed is a method for modifying the frequency response of a wooden article by exciting the article with acoustic energy. Frequency response is the measure of a system's spectrum response at the output due to a signal of varying frequency (but constant amplitude) at its input. The acoustic energy includes at least one excitation frequency, a composite broadband frequency component, or a combination thereof, which is preferably in the audible spectrum (20 to 20,000 Hz). The use of acoustic ene
...

Sonication-assisted Metal-enhanced Fluorescence (SAMEF)-based Bioassays

The present invention provides for sonication-assisted metal-enhanced fluorescence, luminescence, and/or chemiluminescence assay systems using low-intensity ultrasound waves to significantly reduce the assay time by increasing the kinetic movement of molecules within the system.
...

Scanning Near-Field Ultrasound Holography

A high spatial resolution phase-sensitive technique employs a scanning near field ultrasound holography (SNFUH) methodology for imaging elastic as well as viscoelastic variations across a sample surface. SNFUH uses a near-field approach to measure time-resolved variations in ultrasonic oscillations at a sample surface. As such, it overcomes the spatial resolution limitations of conventional phase-resolved acoustic microscopy (i.e. holography) by eliminating the need for far-field acoustic lenses
...

Scanning Near Field Thermoelastic Acoustic Holography (SNFTAH)

A system and method for analyzing a sample is described. The system may include, for example, a light source and a scanning probe microscope probe. The light source may generate a coherent laser beam that is modulated by a waveform of a lower frequency. The modulated laser beam is absorbed by the sample causing thermally induced expansion and resulting in an excitation of acoustic waves. The probe is locally deployed near the sample and detects, in real time, perturbations in the excited acousti
...

Method and Apparatus for Blind Signal Recovery in Noisy, Reverberant Environments

A maximum-kurtosis, distortionless response (MKDR) technique and an extension, the maximum-kurtosis, Wiener estimate (MKWE) technique, are provided. In one form, blind estimates of the speech source's channel response are made from the microphone data and MVDR is applied. The source direction is estimated by finding weights that maximize output kurtosis, or the fourth central statistical moment, in the frequency domain. The MKWE approach approximates the Wiener filter by using MKDR-output noise
...

Systems and Methods for Identifying Speech Sound Features

Systems and methods for detecting features in spoken speech and processing speech sounds based on the features are provided. One or more features may be identified in a speech sound. The speech sound may be modified to enhance or reduce the degree to which the feature affects the sound ultimately heard by a listener. Systems and methods according to embodiments of the invention may allow for automatic speech recognition devices that enhance detection and recognition of spoken sounds, such as by
...

Methods and Systems for Identifying Speech Sounds Using Multi-dimensional Analysis

Methods and systems of identifying speech sound features within a speech sound are provided. The sound features may be identified using a multi-dimensional analysis that analyzes the time, frequency, and intensity at which a feature occurs within a speech sound, and the contribution of the feature to the sound. Information about sound features may be used to enhance spoken speech sounds to improve recognizability of the speech sounds by a listener.
...

Method and System for Determining an Auditory Pattern of an Audio Segment

method and apparatus for determining an auditory pattern associated with an audio segment. An average intensity at each of a first plurality of detector locations on an auditory scale based at least in part on a first plurality of frequency components that describe a signal is determined. A plurality of tonal bands in the audio segment, wherein each tonal band comprises a particular range of detector locations of the first plurality of detector locations is determined. Corresponding strongest f
...

Photo-acoustic Detection Device and Method

An example system for detecting an analyte in a sample of a bodily fluid comprises a test chamber having at least one sidewall and configured to contain at least a portion of a bodily fluid sample, an excitation electromagnetic energy source configured to direct an energy source into the test chamber through the at least one sidewall and to induce a thermoelastic expansion in the one or more analytes, and a sensor configured to detect said thermoelastic expansion in the bodily fluid sample in th
...

Photoacoustic Detection of Analytes in Solid Tissue and Detection System

A preferred system for detecting an analyte in solid tissue (12), such as an intact lymph node, in vitro includes a laser (22) arranged to generate a pulsed laser beam into solid tissue, which can be a fully intact lymph node. An acoustic sensor, and preferably at least three acoustic sensors (20a, 20b, 20c) are arranged in different positions to span a three dimensional space, such as in an X, Y and Z coordinate system, to detect photoacoustic signals generated within the lymph node. At least o
...

Monolithic Fbar-cmos Structure Such As for Mass Sensing

An apparatus comprises a thin-film bulk acoustic resonator such as including an acoustic mirror, a piezoelectric region acoustically coupled to the acoustic mirror, and first and second conductors electrically coupled to the piezoelectric region. In an example, an integrated circuit substrate can include an interface circuit connected to the first and second conductors of the resonator, the integrated circuit substrate configured to mechanically support the resonator. An example can include an a
...

Enhanced Ultra-high Resolution Acoustic Microscope

An optical-acoustic transducer structure includes at least one metal or semiconducting film in which a part of a pump light pulse is absorbed to generate a sound pulse; and at least one dielectric film. The thicknesses and optical properties of the at least one metal or semiconducting film and the at least one dielectric film are selected so that a returning sound pulse results in a measurable change in the optical reflectivity and/or some other optical characteristic of the transducer structure
...

Photoacoustic Imaging Using a Versatile Acoustic Lens

To image various soft tissues in the body using pulsed laser optical excitation delivered through a multi-mode optical fiber to create photoacoustic impulses, and then image the generated photoacoustic impulses with an acoustic detector array, a probe includes either a mirror and an acoustic lens or a special acoustic lens of variable focal length and magnification that can operate in a liquid environment that is aberration-corrected to a sufficient degree that high resolution images can be obta
...

Vertical Line Hydrophone Array

A hydrophone assembly includes at least four hydrophone units for converting an acoustic signal to an electrical signal, the hydrophone units being in a parallel, cylindrically symmetric spaced spatial relationship with each other, and at least one spacer element to maintain the hydrophone units fixed in the spatial relationship to each other, wherein the hydrophone units and spacer element are embedded in an encapsulant to form an elongated, flexible body.
...

3d Soundscaping

A system and method for tracking and tracing motions of multiple incoherent sound sources and for visualizing the resultant overall sound pressure distribution in 3D space in real time are developed. This new system needs only four microphones (although more could be used) that can be mounted at any position so long as they are not placed on the same plane. A sample configuration is to mount three microphones on the y, z plane, while the 4th microphone on a plane perpendicular to the y, z plane.
...

Resonant Optothermoacoustic Detection of Optical Absorption

A device comprising an acoustic detector, one or more thermal sensing elements coupled to the acoustic detector, and a light source. A method comprising directing a beam of light at a wavelength at or near one or more thermal sensing elements, wherein the thermal sensing elements are coupled to an acoustic detector, determining a resonance frequency of the acoustic detector, wherein the acoustic detector is coupled to one or more of the thermal sensing elements, and measuring the response of the
...

Motion Activated Amplifier

An electronic device that includes a motion activated amplifier structured to receive a first DC signal having a first DC voltage level and output a second DC signal having a second DC voltage level that is greater than the first DC voltage level. The motion activated amplifier includes a motion activated switch operatively coupled to transformer/rectifier circuitry, wherein the motion activated switch is structured to receive the first DC signal and in response to being moved output an AC signa
...

Method for Fabricating a Sensor, a Sensor, and a Method for Sensing

A method for fabricating a sensor, a sensor so fabricated, and a method for sensing a stimulus are provided. The method includes providing an elongated open channel, such as, a V-groove, in a substrate, the open channel providing a first surface; removing at least some material from at least a portion of the open channel to provide a second surface displaced from the first surface; positioning a diaphragm on the second surface; and positioning an elongated wave-guide having a beveled end in the
...

Apparatus, Systems and Methods for Enhanced Multi-carrier Based Underwater Acoustic Communications

Advantageous OFDM-based underwater acoustic (UWA) apparatus, systems and methods are provided according to the present disclosure. In general, OFDM transmissions over UWA channels encounter frequency-dependent Doppler drifts that destroy the orthogonality among OFDM subcarriers. The disclosed apparatus, systems, and methods use a two-step approach to mitigate frequency-dependent Doppler drifts for zero-padded OFDM transmissions over fast-varying channels: (1) non-uniform Doppler compensation via
...

Method for Controlling an Auditory Game and Associated Device

The invention relates to a method for controlling an auditory game, wherein the displacement of a game element is given in a real time and is soundly reproducible. The inventive method consists in determining once the beginning event of movement in the state of motion of the game object in a three-dimensional space and of a human user object in the three-dimensional space always in the state of motion in such a way that the state of motion of the game object is compared with the state of motion
...

Nano-microphone Or Pressure Sensor

The invention relates to a method and a device for measuring or detecting and/or generating of pressures or pressure changes, in particular acoustic vibration and a method for production of such a device. The invention particularly relates to a nano-microphone. The device comprises at least one nano-membrane with a support membrane and at least one counter-electrode, the support membrane having at least one monolayer.
...

Mems Microphone Array on a Chip

The present invention relates to microelectromechanical systems (MEMS). In particular, the present invention relates to MEMS arrays for use in acoustics and other applications.
...

Acoustic Mobility Aid for the Visually Impaired

A wide-band sonar system can be used as a mobility aid by the visually impaired. The system includes an acoustic source and a pair of miniature microphone arrays with frequency-dependent beam patterns designed to mimic the properties of the human ear. Each microphone is preferably mounted near a respective ear of the user. In one embodiment the source has a bandwidth of 30-50 kHz and uses a waveform that preferably optimizes the time-bandwidth product. A heterodyning technique is used to shift t
...

Joint Position-pitch Estimation of Acoustic Sources for their Tracking and Separation

The invention relates to a method for localizing and tracking acoustic sources (101) in a multi-source environment, comprising the steps of recording audio-signals (103) of at least one acoustic source (101) with at least two recording means (104, 105), creating a two- or multi-channel recording signal, partitioning said recording signal into frames of predefined length (N), calculating for each frame a cross-correlation function as a function of discrete time-lag values (t) for channel pairs (1
...

Reconstruction of a Recorded Sound Field

Equipment (10) for reconstructing a recorded sound field includes a sensing arrangement (12) for measuring the sound field to obtain recorded data. A signal processing module (14) is in communication with the sensing arrangement (12) and processes the recorded data for the purposes of at least one of (a) estimating the sparsity of the recorded sound field and (b) obtaining plane-wave signals to enable the recorded sound field to be reconstructed.
...

Pulse Stimulation Generation Method

A method of generating stimulation pulses for application by an auditory prosthesis, the method comprising: processing an audio input to obtain time shifted frequency data in which frequency data of one or more frequencies is temporally shifted relative to one or more other frequencies, the time shifted frequency data of each frequency representing the variation in energy at the frequency over time; and generating stimulation pulses to be applied by the auditory prosthesis from the time shifted
...

Acoustic Source Separation

A method of separating a mixture of acoustic signals from a plurality of sources comprises: providing pressure signals indicative of time- varying acoustic pressure in the mixture; defining a series of time windows; and for each time window: a) providing from the pressure signals a series of sample values of measured directional pressure gradient; b) identifying different frequency components of the pressure signals c) for each frequency component defining an associated direction; and d) from th
...

Predicting the perceived spatial quality of sound processing and reproducing equipment

A method and system for predicting the perceived spatial quality (e g. azimuth angle, envelopment) of sound processing and reproducing equipment comprises: measuring or recording the response of a device under test (DUT) to one or more test signals; applying one or more metrics to the reproduced signal(s) to obtain a higher-level representation of the raw data obtained from the DUT to extract a physical measure of the spatial quality; performing calibration by establishing a relationship/correla
...

Apparatus and Method for Sound Reproduction

Method and, apparatus for implementing the method, the method comprising determining control signal data for an array of loudspeakers, the control signal data being such as to control the loudspeakers to produce a desired sound field associated with an audio signal, the method comprises determining control signal data for different frequency components of the desired sound field in respect of respective different positions in a listening volume of the loudspeaker array, wherein determination of
...

Method for determining acoustic features of acoustic signals for the analysis of unknown acoustic signals and for modifying sound generation

The invention relates to a method of determining acoustic features of sound signals indicating the presence or absence of a property of the sound signal or sound generator, it also relates to the use of the result of this determination of features for analysing unknown sound signals as to the presence or absence of a certain relevant property or for modifying the sound generation with a view to optimizing a certain relevant property.
...

Audio-visual Quality Estimation

A method and an apparatus for estimating a quality of an audio-video signal includes calculating audio and video quality factors from audio and video technical characteristics. An audio-video quality factors interaction is computed from an interaction between the audio and video quality factors. At least one of an audio quality, a video quality and an audio-visual quality is computed using the audio and video quality factors and the audio-video quality factors interaction.
...

Orig. Patent for "remote" setting of Automatic Volume Level incl. ambient noise mic

Granted as Distinct Patent IP area: “Remote” Automatic Volume Control” IP with integrated Ambient sound monitoring Technology Description Brief: The US patent 5778077 revolves around the concept of a “remote (wireless) electronic device” which is able to control the volume of a second electronic device, so that a desired audio volume, which is able to be pre-set/chosen by the user (to remain at a constant preferred volume level (of clarity), without irritating (higher and
...

Physics-based Modeling of Acoustic Reverberation

A system and method for predicting active, low-frequency sonar array performance in shallow, littoral waters using a physics-based modeling of acoustic reverberation. An operator characterizes the active sonar's acoustic transmitter and receiver, the environment it is operating in and the targets to be detected. The operator selects appropriate bathymetry, bottom composition and sound-speed profile. The spatial resolution of the bathymetry database is enhanced using fractal interpolation and a b
...

Multi-line Towed Acoustic Array Shape Measurement Unit (SMU)

An acoustic array comprising a plurality of nodes attached to two or more lines. Some or all of the nodes include an emitting transducer and a receiving hydrophone, and the balance include only a receiving hydrophone. Each emitting transducer has associated electronics comprising a high fidelity amplifier and a stored waveform input to the operational amplifier to drive the amplifier, the output of the amplifier exciting the transducer to emit a chirp having a hyperbolic frequency modulated (HFM
...

Advanced Air Deploy Sonobuoy

A smaller package for air deploy active receivers is desired to allow new platforms to be used for launch. In addition a larger sonobuoy array is also desired but must fit into the existing launch canisters. APL researchers have invented a new ADAR which allows for a reduction in size to deploy the current standard sonobuoy configuration. This method uses a stacer which is a type of spring usually manufactured from beryllium copper or other spring material. The stacer is rolled into a helical
...

Radar Ice Sounder with Parallel Doppler Processing

A radar ice sounder, which employs parallel Doppler processing, obtains more reliable and accurate radar ice sounding. The invention uses both incoherent and coherent techniques, in the same paradigm, to achieve simultaneously high Signal-to-Noise Ratio, high Signal-to-Speckle standard deviation Ratio, and high Signal-to-Cutter Ratio. Patent Status: U.S. patent(s) 6,188,348 issued. International patents issued.
...

Algorithm for Vibration Analysis Simulators

Background Over the years, engineers have had great success in regulating unwanted noises created in automobiles/machines. These noise frequencies are caused by vibrations in the machine. Conventional ways for analyzing such vibrations in automobiles involves first calculating the natural frequencies and modes of vibration, and then finding the responses of these modes to approximate the response of the structure. There is an ongoing demand to be able to do this analysis at higher frequencies, a
...

Ultracompact Gas Sensors Incorporating Quartz-Enhanced Photoacoustic Spectroscopy

This invention integrates a quartz oscillator into a photoacoustic device to allow for the detection of resonant acoustic waves, permitting sensitive detection of gases using an extremely small unit. Technology Photoacoustic spectroscopy (PAS) is an established domain of experimental physics based on the detection of sound waves generated in a medium upon absorption of modulated laser radiation. This invention is a new method using a high-finesse quartz oscillator (such as a frequency fork u
...

Near-Field Active Noise Suppression

A multi-channel adaptive control algorithm with system hardware placed in the acoustic near-field for the active minimization of primarily tonal noise from axial flow fans. General Information The current invention consists of a design for an active control system that will significantly reduce the tonal component of the radiated cooling fan noise on a global scale, both quieting the overall noise spectrum and reducing its most annoying component. The system has been researched and designe
...

Active Sound Transmission Control of a Double-Panel Partition

An actively controlled, bidirectional partition that can provide excellent low-frequency attenuation while remaining relatively light weight. Significantly reduces low-frequency noise in systems like aircraft fuselage trim panels, rocket payload fairings, large ceilings, and high-rise buildings without the undesirable increase in mass for the purpose of sound attenuation. The Mechanical Engineering Department at Brigham Young University has developed a functioning prototype of an actively con
...

Notify me of New Entries on this Page

You can receive an email whenever a new patent is added to this category. You can unsubscribe at any time.