EP4312438A1 - System und verfahren zur erzeugung und übertragung von harmonischen schwingungen - Google Patents

System und verfahren zur erzeugung und übertragung von harmonischen schwingungen Download PDF

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Publication number
EP4312438A1
EP4312438A1 EP23187839.8A EP23187839A EP4312438A1 EP 4312438 A1 EP4312438 A1 EP 4312438A1 EP 23187839 A EP23187839 A EP 23187839A EP 4312438 A1 EP4312438 A1 EP 4312438A1
Authority
EP
European Patent Office
Prior art keywords
vibrations
transducer
propagating
transmission device
generating
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.)
Pending
Application number
EP23187839.8A
Other languages
English (en)
French (fr)
Inventor
Riccardo Della Ragione
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.)
Magic Music Di Riccardo Della Ragione
Original Assignee
Magic Music Di Riccardo Della Ragione
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 Magic Music Di Riccardo Della Ragione filed Critical Magic Music Di Riccardo Della Ragione
Publication of EP4312438A1 publication Critical patent/EP4312438A1/de
Pending legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H23/00—Percussion or vibration massage, e.g. using supersonic vibration; Suction-vibration massage; Massage with moving diaphragms
    • A61H23/02—Percussion or vibration massage, e.g. using supersonic vibration; Suction-vibration massage; Massage with moving diaphragms with electric or magnetic drive
    • A61H23/0218—Percussion or vibration massage, e.g. using supersonic vibration; Suction-vibration massage; Massage with moving diaphragms with electric or magnetic drive with alternating magnetic fields producing a translating or oscillating movement
    • A61H23/0236—Percussion or vibration massage, e.g. using supersonic vibration; Suction-vibration massage; Massage with moving diaphragms with electric or magnetic drive with alternating magnetic fields producing a translating or oscillating movement using sonic waves, e.g. using loudspeakers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H23/00—Percussion or vibration massage, e.g. using supersonic vibration; Suction-vibration massage; Massage with moving diaphragms
    • A61H23/02—Percussion or vibration massage, e.g. using supersonic vibration; Suction-vibration massage; Massage with moving diaphragms with electric or magnetic drive
    • A61H23/0245—Percussion or vibration massage, e.g. using supersonic vibration; Suction-vibration massage; Massage with moving diaphragms with electric or magnetic drive with ultrasonic transducers, e.g. piezoelectric
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H2201/00—Characteristics of apparatus not provided for in the preceding codes
    • A61H2201/01—Constructive details
    • A61H2201/0119—Support for the device
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H2201/00—Characteristics of apparatus not provided for in the preceding codes
    • A61H2201/01—Constructive details
    • A61H2201/0157—Constructive details portable
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H2201/00—Characteristics of apparatus not provided for in the preceding codes
    • A61H2201/50—Control means thereof
    • A61H2201/5097—Control means thereof wireless

Definitions

  • the present invention relates to a system for generating and transmitting harmonic vibrations, for example generated starting from an audio source, in particular for exerting a massaging action on a human being.
  • the invention relates also to a method for generating and transmitting the harmonic vibrations generated starting from an audio source, in particular for exerting a massaging action on a human being.
  • transducers that are able to convert the audio waves into harmonic vibrations for different purposes, for example for exerting a massaging action on a person.
  • the transducer is fixed by screws, bolts, or other fixing elements, to a resonant structure to which the person to be subjected to the aforementioned massage, is arranged in contact, also said vibro-massage, mainly with the purpose to reduce the tension and to produce a relaxing effect on the body and, therefore, on the muscles, the skeletal apparatus, and the internal organs.
  • the vibro-massage unit comprises a resonant structure, a source of an audio signal arranged to generate an audio signal and a sound transducer which generates vibrations at a frequency and an amplitude modulated on the basis of the audio signal.
  • the transducer is arranged in contact with the resonant structure at a predetermined point in such a way to be able to propagate the vibrations in a differentiated way selectively concentrating the vibrations on the basis of their frequency and their amplitude in determined areas, obtaining in this way a selective distribution of the vibrations.
  • the vibro-massage unit described in EP1827351 provides a resonant structure of static type, therefore its response in terms of propagation of the vibrations and vibrating action produced on the person who is arranged in contact with the same change only if the frequencies of the audio signal emitted by the audio source change.
  • an object of the present invention to provide a system for generating and transmitting harmonic vibrations that is able to generate a response of dynamic type by the resonant structure.
  • a system for generating and transmitting vibrations comprising:
  • the body for propagating vibrations comprises at least a tree through which the harmonic vibrations are propagated.
  • the vibration transmission device can be provided with at least a first and a second engagement portion arranged to engage the body for propagating vibrations between them.
  • first and second engagement portions can be configured to move from a rest configuration to an engagement configuration causing the same to move away from each other up to reach a spaced position, which, advantageously, allows the body for propagating vibrations to be positioned between them.
  • first and the at least a second engagement portion can be arranged for engaging the body for propagating vibrations following an elastic return of the same from the spaced position towards the rest configuration.
  • the vibration transmission device can be provided with:
  • a housing body can be, furthermore, provided configured to house the aforementioned transducer. More in particular, the housing body can be integral to the vibration transmission device.
  • the housing body is adapted to transmit the harmonic vibrations produced by the transducer to the vibration transmission device.
  • the vibration transmission device can be made of a material configured to transmit harmonic vibrations.
  • the aforementioned material configured to transmit harmonic vibrations can be selected among:
  • an amplifier can be provided between the sound waves source and the transducer.
  • the amplifier can be configured to interface the sound waves source and the transducer with each other.
  • the sound waves source and the transducer can be configured to communicate with each other through respective transmission modules. These can be selected among:
  • the aforementioned determined frequency of the audio signal is a sonic frequency. More in particular, a frequency higher than 15 Hz. Preferably, the aforementioned determined frequency of the audio signal is comprised between 20 and 20000 Hz.
  • the or each engagement portion can be configured, for example shaped, to engage at least a branch, or the trunk, of the tree, for example to encircle the same in a removable and non-invasive way.
  • a method for generating and transmitting vibrations comprises the steps of:
  • the aforementioned body for propagating vibrations comprises at least a tree through which said harmonic vibrations are propagated.
  • a system 100 for generating and transmitting vibrations, in particular harmonic vibrations, comprises a sound waves source 10 which emits an audio signal at a determined frequency, in particular, a frequency higher than 15-20 Hz, preferably between 20 and 20000 Hz, or more in general an audio signal belonging to a determined range of frequencies, preferably between 20 and 20000 Hz, and a transducer 20, for example a sound transducer, or a tactile transducer, operatively connected to the sound waves source 10 and configured to convert the audio signal coming from the sound waves source 10 into vibrations, in particular harmonic vibrations and/or mechanical vibrations.
  • a transducer 20 for example a sound transducer, or a tactile transducer
  • the system 100 provides, furthermore, a body for propagating vibrations, or a resonant body, through which the harmonic vibrations 5 is propagated, in determined directions. It is, furthermore, provided a transmission device 30 configured to transmit the harmonic vibrations produced by the transducer 20 to the body for propagating vibrations 5. This latter has an elongated geometry and is oriented along a vertical or substantially vertical direction.
  • the propagation body 5 can comprise a tree, preferably a live tree, for example a tree of a public park, or a private garden, but also a structure having the shape of a tree, but of artificial type. More in particular, the tree 5 comprises, in general, a plurality of branches and a trunk 8 oriented along a vertical or substantially vertical direction 105. In other words, the longitudinal axis of the trunk 8 substantially coincides with the aforementioned vertical direction 105.
  • the tree 5, or other propagation body comprises a base portion 9, for example the roots, positioned below a ground level 150 of the area where the propagation body 5 is positioned.
  • the vibration transmission device 30 can be positioned at the propagation body 5, for example a tree, in a lateral position (see for example the figures 1 and 2 ) with respect to a sagittal and/or frontal plane, or central or substantially central position, with respect to the same (see for example the figures 4 and 5 ).
  • the propagation direction of the vibrations involves, however, mainly the trunk 8 of the tree 5 which is crossed by the vibrations from above towards below.
  • the vibration transmission device 30 for example made of a material chosen among wood, metal, plastic, composite material, comprises a receiving portion 35 integral to the transducer 20 at which the transducer 20 transmits the harmonic vibrations to the transmission device 30, and an engagement portion 40 configured to removably engage the vibration transmission device 30 to the body for propagating vibrations 5 at respective contact surfaces 36 and 6. More precisely, the aforementioned engagement portion 40 is arranged to engage the body for propagating vibrations 5, from above. In particular, in order to cause the engagement portions 40a-40d to move from the rest configuration to the engagement configuration, the aforementioned transmission device 30 is positioned, from above, on the body for propagating vibrations 5.
  • the vibrations mainly propagate along the aforementioned vertical direction 105, or substantially vertical, which coincides with the longitudinal axis of the body for propagating vibrations.
  • the harmonic vibrations which are transmitted to the body for propagating vibrations 5 propagate through the same generating a subjective response which is different from a propagation body to another, but that, anyway, involves all the body which is crossed from the above towards below.
  • the modality through which the propagation of vibrations and sound occurs across a body in fact, mainly depends on the structure of the body that, in particular, is linked to the material of which it is made of, and mainly to the density of the same.
  • the system 100 according to the invention allows, therefore, to provide a unique sensorial experience which can be transmitted to one or more people 200, or other living beings, at the same time.
  • the sensorial experience can be transmitted to one or more people, or other living beings, 200 that can be directly positioned in contact with the body for propagating vibrations 5 (as diagrammatically shown in figure 4 ) and through the surface on which the same is positioned, for example the ground (as diagrammatically shown in figure 5 ).
  • the harmonic vibrations transmitted to the trunk 8 propagate along a vertical or substantially vertical direction 105, up to reach the roots 9 and from these to the soil where they are located.
  • the or each person 200 who is present in the area where the system 100 is installed will, therefore, receive the harmonic vibrations indirectly from the tree 5 through the soil staying in an erect or seated position, or laying down, and, therefore, not necessarily arranged in direct physical contact with the tree 5.
  • the propagation of the harmonic vibrations and, advantageously, at least in part of the sound waves diagrammatically shown in the figures with concentric waves 300 occurs through the structure of the tree in such a way that in addition to change from tree to tree, can also be different for the same tree after a certain period of time between an installation and the following because the tree, since it is a living being, is subjected to continuous change of its structure and, therefore, of the mode through which the propagation of the vibrations occurs, and, in case, of the sound through the same. Therefore, the present invention allows to have a tactile and sensorial experience that is always different and, therefore, unique all the times that is experienced by a person or a group of people.
  • the system according to the present invention allows to obtain considerable benefits to the health of the trees on which is installed precisely because of the propagation through their structure of the aforementioned audio waves and harmonic vibrations that exert a revitalizing action on the same and, therefore, on people who experience the aforementioned tactile experience.
  • the transmission device 30 is provided with at least a first and a second engagement portion 40a and 40b, in the case of figures 2 , four engagement portions 40a-40d adapted to move from a rest configuration where they do not engage the propagation body 5, in particular the tree, to an engagement configuration where they engage the propagation body 5, for example at least a branch 7 of the tree, or the trunk 8 of the same, in a removable and, preferably, non-invasive way, in such a way not to cause any trauma to the chosen tree.
  • the body for propagating vibrations coincides with the trunk 8 of the tree 5, which, therefore, is crossed, in any case, by the vibrations along the aforementioned vertical or substantially vertical direction 105.
  • the engagement portions 40 can be present also in a number greater than 4, for example a number comprised between 1 and 10, advantageously between 2 and 10.
  • each engagement portion 40a-40d can be an elongated portion having a free end 41a-41d.
  • the engagement portion 40 is able to engage bodies for propagating vibrations 5 of any shape, in particular having a complex shape.
  • the different free ends 41a-41d are adapted to be positioned at different contact zones or portions of the body for propagating vibrations 5, in such a way to transmit the same to a respective portion of the produced harmonic vibrations.
  • the respective free ends 41a-41d can be adapted to gradually move away from each other.
  • the receiving portion 35 can be, advantageously, positioned higher than the free ends 41a-41d of the engagement portions 40a-40d.
  • each engagement portion 40a-40d is the one closer to the transducer 20.
  • at least two other ends, or second ends, 42a and 42b and/or 42c and 42d of at least 2 engagement portions 40a-40d are connected to each other by a connection portion 43, advantageously in such a way to form said receiving portion 35, to propagate the vibrations produced by the transducer 20 from one to another up to the free ends 41a-41d of the engagement portions 40a-40d.
  • the connection portions 43 are arranged in such a way to be superimposed to one another in order to transmit the vibrations produced by the transducer 20 to all the engagement portions 40a-40d.
  • connection portion 43 In the embodiment that is shown from figure 1 to figure 3 , four engagement portions 40a-40d are connected to a single connection portion 43, in such a way to form said receiving portion.
  • the transmission device 30 is adapted to move from the rest configuration to the engagement configuration by forcing the engagement portions 40a-40d to move away, in particular to elastically move away, from each other. More precisely, as diagrammatically shown in figure 3 , once that the force which has, as disclosed above, caused the engagement portions 40a-40d to move away from each other, these tend to go back to the respective starting positions corresponding to the rest configuration, engaging in this way the body for propagating vibrations 5, in particular one or more branches 7 of tree 5.
  • the vibration transmission device 30 is provided with a first and at least a second engagement portion 40a and 40b and with at least a clamping member 45, for example a clip, in particular made of metal. More precisely, each clamping member 45 is adapted to reversibly move from a clamped configuration (see figures 7 and 8 ) where it is adapted to keep the first and second engagement portions 40a and 40b in the engagement configuration, to a disengagement configuration, that is shown in figure 9 for an embodiment of the invention, where it is adapted to allow the first and second engagement portions 40a and 40b to move in the rest configuration in order to allow to remove them.
  • two couples of engagement portions 40a, 40b and 40'a, 40'b are provided in such a way to allow the vibration transmission device 30 to be anchored at two points of the body for propagating vibrations, in particular the tree 5.
  • the transducer 20, or the housing body 25 inside of which it is housed can be mechanically connected to the or each engagement portion 40 and 40' by a link element 37.
  • This can provide a first link arm 38a, advantageously straight, integral to the transducer 20 and/or the housing body 25, and two link arms 38b and 38c which ramify from the first link arm 38a in order to connect this latter respectively to the first and the second connection portion 40 and 40'.
  • the device for transmitting vibrations 30, in particular harmonic, or mechanical, vibration is, furthermore, provided with a housing body 25 configured to house the aforementioned transducer 20. More in particular, the housing body 25 is integral to the transmission device 30. In particular, the housing body 25 is adapted to transmit the harmonic vibrations produced by the transducer 20 to the vibration transmission device 30.
  • the housing body 25 can be provided with a main body provided with an aperture through which the transducer 20 can be introduced into, or extracted from, the main body.
  • the housing body 25 can be provided with a closure, or a lateral wall, adapted to move from an opening position to allow to reach the inside of the aforementioned main body through the aforementioned aperture, and a closing position to avoid that dust, rain, leaves, or other foreign bodies, can reach the transducer 20 compromising the correct operation of the same.
  • an amplifier 60 can be provided configured to interface the sound waves source 10 with the transducer 20.
  • the sound waves source 10 and the transducer 20 can be operatively connected to each other by a wire connection (see figures 1 and 11 ), or by respective transmission modules 14 and 24. These can be chosen, for example, among modules for Bluetooth transmission, modules for WI-FI transmission, USB modules, or a combination thereof. More precisely, the sound waves source 10 can be a plant stereo, but also an electronic device, such as a smartphone, a PC, a tablet, a laptop, a device of Echo-dot type, and similar electronic devices, in particular provided with audio card (see figure 6 ).
  • the transmission device 30 can provide at least a first and a second transmission portion 31 and 32, each of which having a substantially "U", or substantially “V" shape. More precisely, the first and the second transmission portion 31 and 32 are, advantageously, positioned in such a way to intersect one another, for example by superimposing, as in the case illustrated in the figures 4 , 5 and 13 , or penetrating one another for a determined depth (case not shown in figure per simplicity) in such a way to define the aforementioned receiving portion 35.
  • the transmission device 30 can provide a link element 37, advantageously a link arm, or pin, adapted to mechanically connect the first and/or the second transmission portion 31 and 32 with the aforementioned housing body 25, or directly with the transducer 20.
  • the link element 37 can be adapted to house in a through or a blind hole provided at least in one, or both, the transmission portions 31 and 32.
  • the at least two transmission portions 31 and 32 can be connected by or more supplementary link elements 39 transversally arranged to each other, or inclined at predetermined angles, with respect to the respective engagement portions 40, in the case of figure 4 the engagement portions 40d and 40b.
  • the aforementioned transmission portions 31 and 32 are respectively provided with at least a respective engagement portion 40.
  • both the transmission portion 31 and the transmission portion 32 are, respectively, provided with a first and a second engagement portion 40a, 40b, and 40c, 40d.
  • the transmission device 30 can be provided with a number n of engagement portions, for example n can be comprised between 1 and 6 and each transmission portion can be provided with a number n' of respective engagement portions 40, with n' comprised between 1 and 6.
  • the engagement portions 40a-40d can be fastened to the propagation body 5, for example to one or more branches 7 of the tree, by or more anchoring members 34, such as cables, chains, tapes, in particular elastic tapes, and similar. More in particular, the or each anchoring member 34 is adapted to embrace and clamp between them the or each branch 7 and the or each engagement portion 40, in order to guarantee that the transmission device 30 is kept in the correct installation position.
  • the system 100 can provide at least a first and a second transducer 20a and 20b, each of which, advantageously, housed in a respective housing body 25a and 25b.
  • Each transducer 20a, 20b can be engaged to a respective branch 7a, 7b, or to the same branch, by a respective transmission device 30a and 30b provided with respective engagement portions 40a and 40b.
  • each transmission device 30a and 30b can be provided with a link arm, for example a link arm or pivot adapted to mechanically connect the respective housing body 25a, 25b to the respective engagement portion 40a, 40b.
  • the transmission device 30 can be provided with at least an engagement portion 40 configured to move from a compacted configuration to an expanded configuration where is adapted to engage the propagation body 5, for example the tree. More precisely, the engagement portion 40 can be adapted to move from the compacted, or minimum lateral encumbrance, configuration, to the expanded configuration causing, for example, by a rotation or a translation, a plurality of engagement portions 47 to rotate about respective hinge points 48.
  • This solution is particularly advantageous, in the case that the propagation body 5, in particular the tree, is provided with a cavity. Also this solution is for the propagation body 5, in particular the tree, absolutely non-invasive.
  • the system, according to the invention, for generating and transmitting harmonic vibrations can be also directly applied to a person 200.
  • the body for propagating vibrations 5 is constituted by person 200.
  • each engagement portion, for example four engagement portions 40a-40d are adapted to removably engage, from the above, the vibration transmission device 30 to the person 200 through who, therefore, the vibrations are propagated at respective contact surfaces 36 and 6, along the aforementioned vertical or substantially vertical direction 105, that, in this case, substantially coincides with the longitudinal direction of the person 200.

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  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Pain & Pain Management (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Rehabilitation Therapy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Vibration Prevention Devices (AREA)
EP23187839.8A 2022-07-26 2023-07-26 System und verfahren zur erzeugung und übertragung von harmonischen schwingungen Pending EP4312438A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT202200015759 2022-07-26

Publications (1)

Publication Number Publication Date
EP4312438A1 true EP4312438A1 (de) 2024-01-31

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2307424A1 (fr) 1975-04-08 1976-11-05 Bodysonic Kk Installation de reproduction sonore
EP0488338A1 (de) 1990-11-30 1992-06-03 Bodysonic Kabushiki Kaisha Körpersensible akustische Vorrichtung sowie Verfahren zur Schwingungsübertragung dafür
WO2001083024A2 (en) 2000-04-28 2001-11-08 Georgia Tech Research Corporation An apparatus and method for implementing hydro-acoustic therapy for the lungs
EP1827351A1 (de) 2004-11-03 2007-09-05 Riccardo Della Ragione Harmonisches vibromassagegerät
WO2007103325A2 (en) 2006-03-03 2007-09-13 Tactile Sound Systems, Inc. Improved contact speaker
GB2455980A (en) 2007-12-24 2009-07-01 Trigonom Ltd Entertainment apparatus for seated user
US20170173481A1 (en) 2014-03-27 2017-06-22 Amager Hospital A device for the treating of pain with high amplitude low frequency sound impulse stimulation

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2307424A1 (fr) 1975-04-08 1976-11-05 Bodysonic Kk Installation de reproduction sonore
EP0488338A1 (de) 1990-11-30 1992-06-03 Bodysonic Kabushiki Kaisha Körpersensible akustische Vorrichtung sowie Verfahren zur Schwingungsübertragung dafür
WO2001083024A2 (en) 2000-04-28 2001-11-08 Georgia Tech Research Corporation An apparatus and method for implementing hydro-acoustic therapy for the lungs
EP1827351A1 (de) 2004-11-03 2007-09-05 Riccardo Della Ragione Harmonisches vibromassagegerät
WO2007103325A2 (en) 2006-03-03 2007-09-13 Tactile Sound Systems, Inc. Improved contact speaker
GB2455980A (en) 2007-12-24 2009-07-01 Trigonom Ltd Entertainment apparatus for seated user
US20170173481A1 (en) 2014-03-27 2017-06-22 Amager Hospital A device for the treating of pain with high amplitude low frequency sound impulse stimulation

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