MX2020011492A - Blocking plate structure for improved acoustic transmission efficiency. - Google Patents

Blocking plate structure for improved acoustic transmission efficiency.

Info

Publication number
MX2020011492A
MX2020011492A MX2020011492A MX2020011492A MX2020011492A MX 2020011492 A MX2020011492 A MX 2020011492A MX 2020011492 A MX2020011492 A MX 2020011492A MX 2020011492 A MX2020011492 A MX 2020011492A MX 2020011492 A MX2020011492 A MX 2020011492A
Authority
MX
Mexico
Prior art keywords
cavity
acoustic
transducer element
end walls
surrounding
Prior art date
Application number
MX2020011492A
Other languages
Spanish (es)
Inventor
Justin Buckland
Adam Jackson
Amaru Araya-Williams
Benjamin Long
Brian Kappus
Original Assignee
Ultrahaptics Ip Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ultrahaptics Ip Ltd filed Critical Ultrahaptics Ip Ltd
Publication of MX2020011492A publication Critical patent/MX2020011492A/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
    • B06B1/0644—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using a single piezoelectric element
    • B06B1/0662—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using a single piezoelectric element with an electrode on the sensitive surface
    • B06B1/067—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using a single piezoelectric element with an electrode on the sensitive surface which is used as, or combined with, an impedance matching layer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • F04B43/04—Pumps having electric drive
    • F04B43/043—Micropumps
    • F04B43/046—Micropumps with piezoelectric drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B45/00—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids
    • F04B45/04—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having plate-like flexible members, e.g. diaphragms
    • F04B45/047—Pumps having electric drive
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/02—Mechanical acoustic impedances; Impedance matching, e.g. by horns; Acoustic resonators
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
    • G10K9/18—Details, e.g. bulbs, pumps, pistons, switches or casings
    • G10K9/22—Mountings; Casings
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
    • H04R1/025—Arrangements for fixing loudspeaker transducers, e.g. in a box, furniture
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2807—Enclosures comprising vibrating or resonating arrangements
    • H04R1/2811—Enclosures comprising vibrating or resonating arrangements for loudspeaker transducers

Landscapes

  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Reciprocating Pumps (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Manufacturing Of Printed Wiring (AREA)
  • Laminated Bodies (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)

Abstract

Se utiliza una estructura de adaptación acústica para aumentar la potencia irradiada desde un elemento transductor con una impedancia más alta hacia un medio acústico circundante con una impedancia acústica más baja. La estructura de adaptación acústica consiste en una cavidad delgada, sustancialmente plana, limitada por dos paredes de extremo y una pared lateral. Las paredes extremas de la cavidad están formadas por una pared de placa de bloqueo y una pared de elemento transductor separadas por una distancia corta (menos de un cuarto de la longitud de onda de las ondas acústicas en el medio circundante a la frecuencia de funcionamiento). Las paredes de los extremos y la pared lateral delimitan una cavidad con un diámetro aproximadamente igual a la mitad de la longitud de onda de las ondas acústicas en el medio circundante. En funcionamiento, un elemento transductor genera oscilaciones acústicas en el fluido de la cavidad. El elemento transductor puede ser un actuador que genera el movimiento de una pared de extremo en una dirección perpendicular al plano de la cavidad para excitar oscilaciones acústicas en el fluido en la cavidad, y la geometría de la cavidad y la amplificación resonante aumentan la amplitud de la oscilación de presión resultante. La pared lateral de la cavidad o las paredes extremas contienen al menos una abertura colocada alejada del centro de la cavidad para permitir que las ondas de presión se propaguen al medio acústico circundante.An acoustic matching structure is used to increase the power radiated from a transducer element with a higher impedance into a surrounding acoustic medium with a lower acoustic impedance. The acoustic fitting structure consists of a thin, substantially flat cavity bounded by two end walls and a side wall. The end walls of the cavity are formed by a blocking plate wall and a transducer element wall separated by a short distance (less than a quarter of the wavelength of acoustic waves in the surrounding medium at the operating frequency). . The end walls and the side wall delimit a cavity with a diameter approximately equal to half the wavelength of the acoustic waves in the surrounding medium. In operation, a transducer element generates acoustic oscillations in the fluid in the cavity. The transducer element may be an actuator that causes movement of an end wall in a direction perpendicular to the plane of the cavity to excite acoustic oscillations in the fluid in the cavity, and the cavity geometry and resonant amplification increase the amplitude of the resulting pressure swing. The cavity side wall or end walls contain at least one opening positioned away from the center of the cavity to allow pressure waves to propagate into the surrounding acoustic environment.

MX2020011492A 2018-05-02 2019-05-02 Blocking plate structure for improved acoustic transmission efficiency. MX2020011492A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US201862665867P 2018-05-02 2018-05-02
US201962789261P 2019-01-07 2019-01-07
PCT/GB2019/051223 WO2019211616A1 (en) 2018-05-02 2019-05-02 Blocking plate structure for improved acoustic transmission efficiency

Publications (1)

Publication Number Publication Date
MX2020011492A true MX2020011492A (en) 2021-03-25

Family

ID=66476665

Family Applications (1)

Application Number Title Priority Date Filing Date
MX2020011492A MX2020011492A (en) 2018-05-02 2019-05-02 Blocking plate structure for improved acoustic transmission efficiency.

Country Status (12)

Country Link
US (4) US10911861B2 (en)
EP (2) EP4414556A3 (en)
JP (1) JP7354146B2 (en)
KR (2) KR20250060311A (en)
CN (1) CN112384310A (en)
AU (2) AU2019264014A1 (en)
CA (1) CA3098642C (en)
IL (2) IL278402B2 (en)
MX (1) MX2020011492A (en)
SG (1) SG11202010752VA (en)
WO (1) WO2019211616A1 (en)
ZA (1) ZA202006752B (en)

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