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WO2018194469A2 - Dispositif portatif de réduction adaptative du bruit - Google Patents

Dispositif portatif de réduction adaptative du bruit Download PDF

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Publication number
WO2018194469A2
WO2018194469A2 PCT/PA2018/000005 PA2018000005W WO2018194469A2 WO 2018194469 A2 WO2018194469 A2 WO 2018194469A2 PA 2018000005 W PA2018000005 W PA 2018000005W WO 2018194469 A2 WO2018194469 A2 WO 2018194469A2
Authority
WO
WIPO (PCT)
Prior art keywords
noise
speakers
source
speaker
equivalent
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/PA2018/000005
Other languages
English (en)
Spanish (es)
Other versions
WO2018194469A3 (fr
WO2018194469A8 (fr
Inventor
Ronald BARAZARTE
Maytee ZAMBRANO
Carlos Medina
Gaudalupe GONZÁLEZ
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Universidad Tecnologica De Panama
Original Assignee
Universidad Tecnologica De Panama
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 Universidad Tecnologica De Panama filed Critical Universidad Tecnologica De Panama
Publication of WO2018194469A2 publication Critical patent/WO2018194469A2/fr
Publication of WO2018194469A8 publication Critical patent/WO2018194469A8/fr
Publication of WO2018194469A3 publication Critical patent/WO2018194469A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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

Definitions

  • This invention relates to a device and method for reducing noise, in indoor and outdoor areas, from multiple unwanted sound sources, as well as its application in mobile noise sources.
  • the invention concerns the application of a method of estimation and "active attenuation" of an "adaptive” sound source in which unwanted noise is partially canceled by nullifying the generating and fed sound waves at the location. Special attention has been given to the geometric design and the arrangement of the sound sensors and the sound reproduction equipment of the device to ensure noise reduction.
  • the invention relates to such a device and method for its use, especially in construction works in urban areas and noise-sensitive areas, as well as mobile noise sources such as animals, humans, machine tools and household appliances.
  • Construction sites are a source of noise pollution. Because of this, there are many laws around the world that require construction sites to work during the day, in order to avoid disturbing people's sleep. However, some of these jobs require street closures, which in turn increase vehicular congestion during the day. Also, loud noise affects humans both physically and psychologically, which can manifest itself in a reduction in our performance and our ability to react to emergency situations, as well as irreversible damage to hearing and other health problems. Even so, some construction work has to be done indoors or near facilities such as schools, hotels, hospitals and offices, which implies a big problem. Therefore, a solution is required to minimize the noise produced by these construction sites.
  • noise reduction would be desirable. For example, a dog barking continuously, the crying of a baby in an enclosed area, the use of machine tools and even appliances can produce annoying noise. However, in these cases, the noise source is mobile and a solution that can be attached to it would be necessary. Noise reduction techniques, schemes and related equipment are shown in numerous previous inventions. However, noise reduction technology based on signal processing has previously been used to eliminate noise components produced from a source in a specific and normally small space, as well as in US Patent 8,270,626 B2, issued toshridhar, et. to the. in September 2012, and US Patent 6,654,467, issued to York, et. to the. in November 2003, instead of canceling the noise produced by multiple sources as it spreads radially.
  • the main objective of the present invention is to provide a significant reduction of noise, especially in areas sensitive to noise or connected to mobile noise sources using a compact portable device, which includes a control and processing unit that implements an active method of Signal processing to decrease the level of noise produced by various sound sources.
  • Another object of this invention is the use of an active signal processing method for noise reduction from various sound sources.
  • Device is to be placed in noisy outdoor or indoor environments created by various sources of acoustic noise or linked to a single mobile noise source.
  • the preferred embodiment of this device comprises a four-sided pyramidal structure with an arrangement of four input sound sensors and four speakers, a pair of sensor-speakers on each side of the pyramid.
  • the method considered in this invention consists in taking samples of the noise captured by the sensors, and processing these samples by digital means in order to determine an equivalent noise source (location and intensity), which is then used to generate a signal from Noise Cancellation. This cancellation signal is reprocessed and decomposes and each of the resulting components is amplified and reproduced through each of the speakers.
  • the resulting acoustic anti-noise generated is combined with source noise to significantly reduce the level of noise in the environment.
  • the noise sources are periodically sampled to update the noise information and make the system adaptive and self-adjusting.
  • the method contemplates a process to prevent the device from canceling the output anti-noise signal of the device itself.
  • FIG. 1 is a pictorial drawing of the preferred embodiment of our invention indicating the main components.
  • FIG. 2 shows the top, back and side of the preferred embodiment of our invention, as well as a pictorial drawing.
  • FIG. 3 is the functional diagram of our invention. Shows input devices, signal processing stages and speakers.
  • FIG. 4 shows the top, back and side of an alternative embodiment of our invention, as well as its pictorial drawing.
  • the following figures show the portable device for adaptive noise reduction.
  • the drawings are intended to demonstrate the functionality of such a device and its main components. However, these images are not to scale. Various sizes and shapes of the device can be determined, based on the application specific power output requirements and the available speaker and microphone technologies. Even so, the drawings are clear enough to establish the concept of operation and methodology.
  • FIG. 1 is a pictorial drawing of the preferred embodiment of our invention indicating the main components.
  • the invention is comprised of a speaker set 1 and a power source 6.
  • This particular embodiment of the speaker set consists of four triangular panels 2 assembled together in a pyramidal configuration. Such configuration has been chosen so that the noise reduction effect produced by the device has hemispherical coverage.
  • a loudspeaker with a coverage angle of 90 ° 3 is installed in each triangular panel 2, oriented so that together they cover 360 ° horizontally and 180 ° vertically without producing reflections with the ground.
  • a sound sensor 4 is installed in each triangular panel as well. These sound sensors provide 360 ° coverage around the speaker set.
  • This realization of the The invention can be carried out with alternative geometries depending on the coverage angle of the speakers used.
  • the speaker set 1 is connected to the power source 6 through the power cable 5.
  • FIG. 2 shows the top, back and side of the preferred embodiment of our invention, as well as a pictorial drawing. These views clearly demonstrate the symmetry of the realization of our invention. This symmetry allows the correct functioning of the device, regardless of its location with respect to the noise sources whose effect we are trying to cancel.
  • FIG. 3 is the functional diagram of our invention. Shows input devices, signal processing stages and speakers.
  • the noise sensors 7 collect the noise levels that are perceived on each side of the speaker set.
  • the signal from these sensors is sent to the control and processing unit 8. Once in the processing unit, these signals are compared and combined in the acoustic equivalent source estimator 9. There, the position, amplitude and shape Wavelengths of an equivalent source are estimated, which is representative of the sum of all noise sources perceived by our invention.
  • the signal and the resulting position are then sent to 10, the phase shift unit and adaptive correction. This unit generates a waveform that would cancel out the equivalent noise source and correct it for any delay or other disturbances that would affect proper noise cancellation.
  • the signal enters the speaker control unit 11, in this unit the audio components required of each speaker to synthesize the equivalent cancellation noise source are determined and sent to each of the speakers 12 which then They produce the audio signals necessary to reduce the equivalent noise generated at the place of use of our invention.
  • the frequency range of the equivalent noise source to be reduced is selectable.
  • FIG. 4 shows the top, back and side of an alternative embodiment of our invention, as well as its pictorial drawing.
  • An alternative embodiment of the speaker assembly 13 is composed of four triangular panels 14 that form a three-sided pyramid.
  • a loudspeaker with a coverage angle of 120 ° 15 together with a sound sensor 16 is placed on each side of the pyramid and at its base.
  • the speaker set 13 is connected to the power source 17 through the power cable 18.
  • the speaker set is suspended vertically by a cable 19. This configuration produces a spherical coverage noise reduction effect.
  • This embodiment of the invention can be performed with alternative geometries depending on the coverage angle of the speakers used.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)

Abstract

La présente invention concerne un dispositif et un procédé permettant de réduire le bruit, dans des zones intérieures et extérieures, provenant de multiples sources sonores non désirées ou d'une seule source de bruit mobile. Le dispositif est composé d'un ensemble de haut-parleurs qui consiste en de multiples panneaux assemblés selon une configuration géométrique qui dépend de l'angle de couverture des haut-parleurs utilisés. Le dispositif met en oeuvre un procédé actif de traitement de signaux qui implique une unité d'estimation de source équivalente de bruit, une unité adaptative de déplacement et de correction de phase et une unité de commande des haut-parleurs qui synthétise le son.
PCT/PA2018/000005 2017-02-08 2018-01-30 Dispositif portatif de réduction adaptative du bruit Ceased WO2018194469A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PA9150001 2017-02-08
PA91500-01 2017-02-08

Publications (3)

Publication Number Publication Date
WO2018194469A2 true WO2018194469A2 (fr) 2018-10-25
WO2018194469A8 WO2018194469A8 (fr) 2019-01-24
WO2018194469A3 WO2018194469A3 (fr) 2019-03-14

Family

ID=63856602

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/PA2018/000005 Ceased WO2018194469A2 (fr) 2017-02-08 2018-01-30 Dispositif portatif de réduction adaptative du bruit

Country Status (1)

Country Link
WO (1) WO2018194469A2 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4249037A (en) * 1978-11-08 1981-02-03 Dexter John L Pyramid loudspeakers with twin cross-phased mid-range speakers
WO2002003751A1 (fr) * 2000-06-30 2002-01-10 Fps Inc. Systeme de haut-parleur et dispositif de suppression de bruit
US20100135505A1 (en) * 2008-12-03 2010-06-03 Graebener David J Very high intelligibility mass notofication system
JP2011013403A (ja) * 2009-07-01 2011-01-20 Yamaha Corp 周囲ノイズ除去装置
ES2834442T3 (es) * 2011-05-11 2021-06-17 Silentium Ltd Sistema y método de control del ruido
US11165399B2 (en) * 2013-12-12 2021-11-02 Jawbone Innovations, Llc Compensation for ambient sound signals to facilitate adjustment of an audio volume

Also Published As

Publication number Publication date
WO2018194469A3 (fr) 2019-03-14
WO2018194469A8 (fr) 2019-01-24

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