Patent
Sound localization using parametric ultrasound
TLDR
In this paper, a transmitter directs a narrow RF ultrasonic beam through a body cavity to a receiver on the other side of the cavity, where the beam is steered to be intercepted by audio signal sources in the body cavity, such as a fetal heart or multiple fetal hearts.Abstract:
A transmitter directs a narrow RF ultrasonic beam through a body cavity to a receiver on the other side of the cavity The beam is steered to be intercepted by audio signal sources in the body cavity, such as a fetal heart or multiple fetal hearts, which modulate the ultrasonic beam The received parametric beam is demodulated and filtered to provide a relatively noise free audio reproduction of an audio signal source In one embodiment, two transmitters are steered independently to direct respective beams to respective receivers to produce two signals and, thus, a binaural audio reproduction of an audio signal source The audio reproduction is at a maximum when the two beams intersect at the audio signal sourceread more
Citations
More filters
PatentDOI
Method and apparatus for displaying body sounds and performing diagnosis based on body sound analysis
TL;DR: In this paper, a lung sound diagnostic system for use in collecting, organizing and analyzing lung sounds associated with the inspiration(s) and expiration (s) of a patient is presented.
PatentDOI
Delivery of theraputic ultrasound by two dimensional ultrasound array
TL;DR: In this article, a two-dimensional ultrasound array includes a controller that controls beam forming and focusing to scan the focal point of the beam in a pattern within an identified structure of an image.
PatentDOI
Steering of directional sound beams
Jun Yang,Woon-Seng Gan,Meng Hwa Er,Chee Mun Kelvin Lee,Khim Sia Tan,Yew Hin Liew,Furi Andi Karnapi,Kan Sha,Yi Wang +8 more
TL;DR: In this paper, a method for steering a directional audio beam that is self-demodulated from an ultrasound carrier is described. But the authors do not specify the amplitude and phase of the audio signal.
PatentDOI
Acoustic detection of respiratory conditions
TL;DR: In this paper, sound waves or vibrations that have interacted with a respiratory condition within a patient and which impinge on the chest wall of the patient are processed using percussive inputs to the patient's chest wall.
Patent
Electronic auscultation system for patient simulator
Greg J. Amend,Craig S. Tinker +1 more
TL;DR: In this article, an electronic auscultation system and method for simulating sounds arising from human organs for use in an anatomical simulation device including a patient simulating mannequin torso, a plurality of electro-magnetic transmitters having antenna coils positioned in predetermined locations relative to said torso beneath the torso surface and each transmitter being connected to one or more computer sound cards which, upon activation, generate signals from prerecorded sound data which generates the appropriate sounds of human organs based on the transmitter location.
References
More filters
PatentDOI
Noninvasive vibration measurement system and method for measuring amplitude of vibration of tissue in an object being investigated
Peter H. Rogers,Helen M. Cox +1 more
TL;DR: In this paper, a continuous wave beam of ultrasonic energy is transmitted along one path and focused at the tissue to be investigated, and a focused transducer receives the reflected beam along a second axis such that the intersection of transmitted and received beams define a small, concentrated region positioned at the object under investigation.
Patent
Ultrasonic method for detecting the accumulation of cholesterol and other deposits in blood vessels and the like
TL;DR: In this article, the authors proposed a method to detect accumulated foreign deposits of material in vessels of living human beings, such as cholesterol in blood vessels, without causing any disruption or damage to the surrounding walls of the vessels.
Patent
Methods of and apparatus for ascertaining the characteristics of motion of inaccessible moving elements
TL;DR: In this paper, a method and apparatus for obtaining an audible signal containing information as to the characteristics of at least one moving element situated internally of a living body and in which a transmitting transducer fed with an electrically generated signal of supersonic frequency transmits stress waves through the body tissue to the moving element to be investigated, and a receiving transducers receives reflected waves and feeds a received electrical signal to a receiver containing a multiplier or other modulator for generating an output signal of difference frequency in the audible range.
Patent
Apparatus for refining signals derived from fetal heartbeats
TL;DR: In this article, an ultrasonic transducer is used for refinement of fetal heart signals from an ultrasound transducers, with improved signal processing circuitry connected to the transducers to convert useful information-carrying energy in the output into a refined electrical signal, and correlation circuitry for providing an output to a cardiotachometer.