US2986140A - Apparatus and process for relieving pain and discomfort - Google Patents

Apparatus and process for relieving pain and discomfort Download PDF

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Publication number
US2986140A
US2986140A US779365A US77936558A US2986140A US 2986140 A US2986140 A US 2986140A US 779365 A US779365 A US 779365A US 77936558 A US77936558 A US 77936558A US 2986140 A US2986140 A US 2986140A
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US
United States
Prior art keywords
discomfort
patient
pain
signals
sound signals
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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.)
Expired - Lifetime
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US779365A
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English (en)
Inventor
Wallace J Gardner
Joseph C R Licklider
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Bolt Beranek & Newnan Inc
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Bolt Beranek & Newnan Inc
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Publication date
Priority to DENDAT1303812D priority Critical patent/DE1303812C2/de
Application filed by Bolt Beranek & Newnan Inc filed Critical Bolt Beranek & Newnan Inc
Priority to US779365A priority patent/US2986140A/en
Priority to GB39192/59A priority patent/GB896423A/en
Priority to FR810678A priority patent/FR1240957A/fr
Priority to BE585422A priority patent/BE585422A/fr
Priority to CH8156859A priority patent/CH366927A/fr
Application granted granted Critical
Publication of US2986140A publication Critical patent/US2986140A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C1/00—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design
    • A61C1/08—Machine parts specially adapted for dentistry
    • A61C1/081—Pain-alleviating features
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C19/00—Dental auxiliary appliances
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M21/00—Other devices or methods to cause a change in the state of consciousness; Devices for producing or ending sleep by mechanical, optical, or acoustical means, e.g. for hypnosis
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M21/00—Other devices or methods to cause a change in the state of consciousness; Devices for producing or ending sleep by mechanical, optical, or acoustical means, e.g. for hypnosis
    • A61M2021/0005—Other devices or methods to cause a change in the state of consciousness; Devices for producing or ending sleep by mechanical, optical, or acoustical means, e.g. for hypnosis by the use of a particular sense, or stimulus
    • A61M2021/0027—Other devices or methods to cause a change in the state of consciousness; Devices for producing or ending sleep by mechanical, optical, or acoustical means, e.g. for hypnosis by the use of a particular sense, or stimulus by the hearing sense

Definitions

  • the present invention relates to apparatus and processes for relieving a patients pain and discomfort, and, more particularly, to an effective producer of analgestic or anesthetic action resulting from a particular utilization of audible sounds.
  • analgesic and anesthetic devices have been employed throughout the years to ease the pain and discomfort of a patient subjected to dental operations and the like. Included in such prior-art techniques are the administration of nitrous oxide or other gaseous medium, the injection of novocaine or other analgesic substances, and, in more serious cases, the application of a general anesthetic. All of these techniques, however, are subject to certain risks and disadvantages, but it has been considered that techniques of administration and supervision of the patient have reduced the dangers to a minimum.
  • An object of the present invention is completely to eliminate all such dangers and disadvantages, and yet to provide the patient with adequate relief of pain and discomfort resulting from such operations and the like.
  • Underlying the invention is the discovery that a phenomenon, relieving pain and discomfort, takes place when acoustic energy of a particular nature is applied in a particular manner to the patients auditory sensory apparatus, thereby alleviating the necessity for injecting dangerous gaseous media into the lungs of a patient, or injecting anesthetic solutions and the like into the blood stream; both, as before stated, subject to dangers and discomforting to the patient.
  • a further object is to provide a new and improved apparatus that is particularly adapted for carrying out the pain-and-discomfort-relieving process of the present invention.
  • An additional object is to provide a new and improved audio signal apparatus. 7
  • the invention resides in a process and apparatus for relieving the patients sensation of pain and discomfort, such as that originating from dental operations and the like, that embodies the production of audible sound signals, preferably substantially continuous in frequency spectrum and time and, desirably, a combination of intelligible program signals, such as music and the like, supplemented by random signals, such as noise and the like.
  • audible sound signals preferably substantially continuous in frequency spectrum and time and, desirably, a combination of intelligible program signals, such as music and the like, supplemented by random signals, such as noise and the like.
  • These signals are applied during the dental operations and the like, to the ears of a patient with all 'ice other sounds substantially masked from the said ears.
  • the amplitude level of the signal is adjusted to a value that is at least suflicient to relieve the patients sensation of pain and discomfort, as a result of the phenomenon underlying the present invention.
  • a patient 1 is shown undergoing a dental operation, such as the application of a drill 5 to the teeth of the patient. It has been discovered, as before indicated, that if the patient receives, in a particular manner, certain audible sound signals, or combinations of signals, with all other sounds appropriately masked, the patient does not experience the pain and discomfort normally attendant upon the drilling or other operations carried out by the dentist in the patients mouth.
  • the patient does not obtain so massive a pain sensation from a given amount of stimulation at the teeth; so that the relaxed state of the patient, even of itself, has been found to decrease the amount of pain and discomfort that is experienced.
  • the dentist begins to drill, however, and the sound and vibration'associated with the drilling operation is immediately evident to the patient, the patient becomes tense. It appears to be the apprehension and anxiety resulting from such tension that produces a good part of the sensation of pain and discomfort.
  • the present invention therefore, provides for the diverting or masking of the sensation that normally accrues to pain by injecting into the earphones17, 17", a
  • the acoustic energy should have substantially a continuous frequency spectrum and should be substantially continuous in time.
  • the music or other signals from the source 7, moreover, should generally be supplemented with noise or random acoustic signals, as from a further sourceor generator 2, which like source .7 may be a well known electric generator of such signals.
  • the patient 1, through controlling the relative amplitudes of the intelligible signal and the random flooding signal, at will, may adjustthe sound level to a value at which he finds the pain and discomfort of the operation to be minimal and entirely bearable;
  • teeth have been extracted from patients subjected to the audio anesthetic of the present invention, without pain and discomfort; and patients with headaches have reported the disappearance of the headache after receiving the audio anesthetic.
  • a preferred and particularly adaptable apparatus for administering the audio anesthetic of the present invention embodies the type of electrical circuits shown in the drawings.
  • the music or other source of preferably intelligible information is fed from the reproducing apparatus 7, such as the before-mentioned tape recorder, along two preferably stereo channels A and B, by conductors 9 and 9'.
  • the conductors 9 and 9' connect through intermediately grounded relatively adjustable balancing attenuators 10, 10', to a pair of potentiometers 11, 11', the respective sliders 13 and 13' of which are shown ganged together.
  • the sliders 13, 13 represent a patients hand control for adjusting the volume or level of the music or other intelligence information. It is, of course, to be understood thatother sound effects may similarly be applied, if de- The patients sired. In the case of chlidren, for example, animal sounds, trains, airplanes and other entertaining sounds may be employed.
  • the noise generator 2 is connected through a filter 3, that selects the predetermined band of noise frequencies to be employed, and by conductors 4 and 4 to similar relatively adjustable attenuators 12, 12, that, in turn, connect to potentiometers 6 and 6.
  • Sliders 8, 8 associated with potentiometers 6, 6, represent a further hand control for the patient to enable him to control the level of the noise or random sounds.
  • the music or other intelligible audio information is applied from the potentiometer sliders 13, 13' by conductors 15, 15 to respective mixing resistors R and R Output conductors 14, 14', feeding the noise signals from the sliders 8, 8, similarly connect with respective mixing resistors R and R
  • the mixing resistors R and R have a common terminal P, and the resistors R and R similarly share a common terminal P.
  • spoiler circuits such as the by-pass capacitors C, C may be introduced at points P and P, as by operating the switch S to its lower or ground position, in order to limit the band or frequency response of the signals ultimately applied to the earphones 17 and 17.
  • the earphones may incorporate conventional transducers for producing sound signals corresponding to the electrical signals from the mixing resistors and serve to direct the sound signals bilaterally into the patients auditory system.
  • the earphones produce dilferent stereo sound signal components from the corresponding different electrical signals applied thereto.
  • the controls 8, 8'8' may be ganged to a switch 8;, as shown as G.
  • the sliders 8, 8' will close the switch S when they are at their minimal positions.
  • energy is fed through the transformer 23 to energize a solenoid 25, thus to move its conventionally grounded contactor armature 27 downward, closing the contacts 29.
  • Closure of the contacts 29 connects through conductors 31 and 31' to the before-mentioned conductors 14 and 14', thereby short-circuiting the output of the noise generator 2 that is fed to the mixing resistors.
  • a switch S When it is desired to have a dentist communicate with the patient, who, of course, in accordance with the present invention, has all external sounds masked by the appropriate earphones 17, 17', a switch S is closed. This energizes a motor M from a transformer 33. The motor M will then control, through a gang connection 35, the position of sliders 19, 19 upon respective potentiometers R and R As the resistances of potentiometers R and R are thus introduced in circuit with respective conductors 117' and 117 emanating from terminals P and P, respectively, the output of the mixer network R R R R R will he attenuated.
  • the motor M is provided with a conventional limit cam, not shown, for stopping the position of the potentiometer sliders 19, 19' at the appropriate point.
  • the operation of the motor M may simultaneously close a further switch S to connect a microphone 37 by conductor 39, schematically shown connected to both of the amplifiers A and A for this condition.
  • the dentist may then communicate with the patient through the microphone 37.
  • switch S When switch S is opened, the sliders 19, 19' may be spring-returned (or otherwise) to their original positions, opening switch S and disconnecting the microphone circuit.
  • Apparatus of the character described having, in combination, means for producing audible sound signals comprising a mixture of intelligible sound signals, such as music and the like, and random sound signals, such as noise and the like, means for directing the said audible sound signals into the auditory system of a patient and for masking therefrom substantially all other sounds, adjustable means for controlling the relative amplitude levels of the intelligible sound signals and the random sound signals, means for reducing the level of the said sound signals directed into the patients auditory system, and means operable in response to the reducing means for directing signals from a further sound source into the said auditory system of the patient.
  • Apparatus of the character described having, in combination, electric generator means of signals of an intelligible nature, such as music and the like, electric generator means of random signals, such as noise and the like, means connected to both generator means for mixing the generated signals, means for producing sound signals corresponding to the mixed signals and for directing the sound signals into the auditory system of a patient, means for masking firom the said auditory system substantially all other sounds, adjustable means for controlling the amplitude level of the sound signals directed into the patients auditory system, means for reducing the level of the said sound signals directed into the patients auditory system, and means operable in response to the reducing means for connecting a further signal source to the said producing means, the controlling means comprising means for adjusting the relative amplitudes of the intelligible and random sound signals.
  • a process for relieving a patients sensation of pain or discomfort originating from a pain-or-discomfort producing stimulus to which the patient is subjected that comprises, producing audible sound signals substantially continuous in frequency spectrum and time and comprising noise sound signals, applying said audible sound 6 signals to the auditory system of the patient during the subjection of the patient to the stimulus, masking all other sounds from said auditory system, and increasing the amplitude level of said noise sound signals at least to a level substantially decibels above .0002 microbar for a period at least substantially commensurate with the duration of the stimulus, whereby said sensation of pain or discomfort resulting from said stimulus is relieved.
  • a process for relieving a patients sensation of pain or discomfort originating from a pain-or discomfort producing stimulus to which the patient is subjected that comprises, producing audible sound signals substantially continuous in frequency spectrum and time and comprising noise sound signals and intelligible sound signals, such as music, applying said audible sound signals to the auditory system of the patient during the subjection of the patient to the stimulus, masking all other sounds from said auditory system, and increasing the amplitude level of at least said noise sound signals at least to a level substantailly 100 decibels above .0002 microbar for a period at least substantially commensurate with the duration of the stimulus, whereby said sensation of pain or discomfort resulting from said stimulus is relieved.

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  • Health & Medical Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Physics & Mathematics (AREA)
  • Pain & Pain Management (AREA)
  • Acoustics & Sound (AREA)
  • Psychology (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
  • Accommodation For Nursing Or Treatment Tables (AREA)
US779365A 1958-12-10 1958-12-10 Apparatus and process for relieving pain and discomfort Expired - Lifetime US2986140A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
DENDAT1303812D DE1303812C2 (de) 1958-12-10 Anordnung mit kopfhoerern, die zur ausschaltung oder minderung von schmerz und unbehagenempfindungen bei zahnaerztlicher behandlung an ein elektro-akustisches musikwiedergabegeraet angeschlossen sind
US779365A US2986140A (en) 1958-12-10 1958-12-10 Apparatus and process for relieving pain and discomfort
GB39192/59A GB896423A (en) 1958-12-10 1959-11-18 Apparatus for relieving pain and discomfort
FR810678A FR1240957A (fr) 1958-12-10 1959-11-19 Appareil et procédé pour soulager la douleur
BE585422A BE585422A (fr) 1958-12-10 1959-12-08 Appareil et procédé pour soulager la douleur.
CH8156859A CH366927A (fr) 1958-12-10 1959-12-08 Procédé pour masquer la douleur et appareil pour sa mise en oeuvre

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US779365A US2986140A (en) 1958-12-10 1958-12-10 Apparatus and process for relieving pain and discomfort

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US2986140A true US2986140A (en) 1961-05-30

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US779365A Expired - Lifetime US2986140A (en) 1958-12-10 1958-12-10 Apparatus and process for relieving pain and discomfort

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US (1) US2986140A (de)
BE (1) BE585422A (de)
CH (1) CH366927A (de)
DE (1) DE1303812C2 (de)
FR (1) FR1240957A (de)
GB (1) GB896423A (de)

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3103219A (en) * 1961-07-27 1963-09-10 Richard T Chadner Sleep inducing heating pad
US3140709A (en) * 1961-05-29 1964-07-14 Bolt Beranek & Newman Apparatus and process for relieving pain and discomfort
US3205316A (en) * 1961-04-03 1965-09-07 Webcor Inc Hypnotic anesthesia process and apparatus for performing same
US3207847A (en) * 1961-09-28 1965-09-21 Barry M Epstein Remotely controlled sound system
US3213851A (en) * 1960-05-03 1965-10-26 Jose A Currea Dental analgesia processes and devices
US3230320A (en) * 1962-04-26 1966-01-18 Kenneth C Kerr Dental chair
US3238307A (en) * 1962-12-17 1966-03-01 Arthur R Peck Dictation transcriber's receiving apparatus
US3908634A (en) * 1971-08-13 1975-09-30 Frank J Monaghan Method and apparatus for inducing localized analgesic condition
US4024535A (en) * 1976-06-28 1977-05-17 Acoustical Design Incorporated Sound generating system for a sound masking package
US4082918A (en) * 1977-01-21 1978-04-04 Chang Roland Wan Chan Audio analgesic unit
DE2813000A1 (de) * 1977-03-24 1978-10-05 Andreas Pavel Guertel mit geraeten zum anhoeren von reproduzierter musik
US4185167A (en) * 1976-06-28 1980-01-22 Acoustical Design Incorporated Sound masking package
US4227516A (en) * 1978-12-13 1980-10-14 Meland Bruce C Apparatus for electrophysiological stimulation
US4395739A (en) * 1979-06-21 1983-07-26 Sony Corporation Recording/reproducing apparatus with selective attenuation of reproduced signals to facilitate comprehension of external speech signals
US4676257A (en) * 1984-12-20 1987-06-30 Pain Prevention, Inc. Dental anesthesia apparatus
WO1987004630A1 (en) * 1986-02-10 1987-08-13 Nilsson Sven Erik Sleep and relaxation promoting aid
US4844091A (en) * 1988-01-26 1989-07-04 C.P.S. Inc. Method for monitoring a state of being
US4966164A (en) * 1987-12-29 1990-10-30 Tradatlantex Ag Combined sound generating device and electrical acupuncture device and method for using the same
US20030225310A1 (en) * 2002-05-28 2003-12-04 Kawamata Shin?Apos;Ichi Apparatus for generating composite wave to reaction point
WO2008052535A1 (de) * 2006-11-03 2008-05-08 Gilbert Duong Von der hand zu greifende drückvorrichtung
US20140363011A1 (en) * 2013-06-05 2014-12-11 Yi Sheng Co., Ltd. Elimination system for diverting dental instrument noise
US20150304761A1 (en) * 2013-09-27 2015-10-22 Peman Montazemi Noise abatement system for dental procedures
US20160038712A1 (en) * 2013-04-03 2016-02-11 Luca Gubert Finsterle Sound generation system with two audio channels for treating psychological/psychiatric and neurological disorders
WO2021035276A1 (en) * 2019-08-23 2021-03-04 David Flint Pain management methodology

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990001966A1 (en) * 1988-08-24 1990-03-08 Graeme Francis Peter Method and apparatus for the prevention of motion sickness
JPH0741443Y2 (ja) * 1991-03-26 1995-09-27 株式会社モリタ製作所 パノラマｘ線撮影装置
DE4444436C2 (de) * 1994-04-27 1996-06-27 Gilbert Dr Duong Audiovisuelles Therapieerleichterungssystem
DE19954681C2 (de) * 1999-11-13 2002-05-29 Uwe Busmeier Verfahren zur Reduzierung oder Eliminierung der von einem Patienten bei einer Behandlung, insbesondere Zahnbehandlung, wahrgenommenen Behandlungsgeräusche

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2217394A (en) * 1939-02-06 1940-10-08 Ray O Vac Co Method and apparatus for testing hearing
US2310589A (en) * 1942-01-26 1943-02-09 Mueller & Company V Signal interrupting means for audiometers
US2466054A (en) * 1947-09-27 1949-04-05 Victor H Siebel Method and apparatus for minimizing pain caused by drilling teeth
US2511482A (en) * 1943-09-17 1950-06-13 Sonotone Corp Method of testing hearing
US2527656A (en) * 1947-04-10 1950-10-31 Murray A Reinsdorf Combination headrest and earphones
US2533667A (en) * 1946-11-27 1950-12-12 Bertram M Harrison System for testing hearing
US2625613A (en) * 1950-10-04 1953-01-13 Maico Company Inc Tone interrupter for audiometers
US2629023A (en) * 1949-12-09 1953-02-17 Fitte George A La Sound reproducer attachment for headrests
US2662940A (en) * 1950-10-04 1953-12-15 Maico Company Inc Automatic power output limiting control system for audiometers
US2753397A (en) * 1951-01-15 1956-07-03 Jaquet A G Audiometer and method of audiometry

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2217394A (en) * 1939-02-06 1940-10-08 Ray O Vac Co Method and apparatus for testing hearing
US2310589A (en) * 1942-01-26 1943-02-09 Mueller & Company V Signal interrupting means for audiometers
US2511482A (en) * 1943-09-17 1950-06-13 Sonotone Corp Method of testing hearing
US2533667A (en) * 1946-11-27 1950-12-12 Bertram M Harrison System for testing hearing
US2527656A (en) * 1947-04-10 1950-10-31 Murray A Reinsdorf Combination headrest and earphones
US2466054A (en) * 1947-09-27 1949-04-05 Victor H Siebel Method and apparatus for minimizing pain caused by drilling teeth
US2629023A (en) * 1949-12-09 1953-02-17 Fitte George A La Sound reproducer attachment for headrests
US2625613A (en) * 1950-10-04 1953-01-13 Maico Company Inc Tone interrupter for audiometers
US2662940A (en) * 1950-10-04 1953-12-15 Maico Company Inc Automatic power output limiting control system for audiometers
US2753397A (en) * 1951-01-15 1956-07-03 Jaquet A G Audiometer and method of audiometry

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3213851A (en) * 1960-05-03 1965-10-26 Jose A Currea Dental analgesia processes and devices
US3205316A (en) * 1961-04-03 1965-09-07 Webcor Inc Hypnotic anesthesia process and apparatus for performing same
US3140709A (en) * 1961-05-29 1964-07-14 Bolt Beranek & Newman Apparatus and process for relieving pain and discomfort
US3103219A (en) * 1961-07-27 1963-09-10 Richard T Chadner Sleep inducing heating pad
US3207847A (en) * 1961-09-28 1965-09-21 Barry M Epstein Remotely controlled sound system
US3230320A (en) * 1962-04-26 1966-01-18 Kenneth C Kerr Dental chair
US3238307A (en) * 1962-12-17 1966-03-01 Arthur R Peck Dictation transcriber's receiving apparatus
US3908634A (en) * 1971-08-13 1975-09-30 Frank J Monaghan Method and apparatus for inducing localized analgesic condition
US4024535A (en) * 1976-06-28 1977-05-17 Acoustical Design Incorporated Sound generating system for a sound masking package
US4185167A (en) * 1976-06-28 1980-01-22 Acoustical Design Incorporated Sound masking package
US4082918A (en) * 1977-01-21 1978-04-04 Chang Roland Wan Chan Audio analgesic unit
DE2813000A1 (de) * 1977-03-24 1978-10-05 Andreas Pavel Guertel mit geraeten zum anhoeren von reproduzierter musik
US4227516A (en) * 1978-12-13 1980-10-14 Meland Bruce C Apparatus for electrophysiological stimulation
US4395739A (en) * 1979-06-21 1983-07-26 Sony Corporation Recording/reproducing apparatus with selective attenuation of reproduced signals to facilitate comprehension of external speech signals
US4676257A (en) * 1984-12-20 1987-06-30 Pain Prevention, Inc. Dental anesthesia apparatus
WO1987004630A1 (en) * 1986-02-10 1987-08-13 Nilsson Sven Erik Sleep and relaxation promoting aid
US4966164A (en) * 1987-12-29 1990-10-30 Tradatlantex Ag Combined sound generating device and electrical acupuncture device and method for using the same
US4844091A (en) * 1988-01-26 1989-07-04 C.P.S. Inc. Method for monitoring a state of being
US6843765B2 (en) * 2002-05-28 2005-01-18 Shin'ichi Kawamata Apparatus for generating composite wave to reaction point
US20030225310A1 (en) * 2002-05-28 2003-12-04 Kawamata Shin?Apos;Ichi Apparatus for generating composite wave to reaction point
WO2008052535A1 (de) * 2006-11-03 2008-05-08 Gilbert Duong Von der hand zu greifende drückvorrichtung
US20160038712A1 (en) * 2013-04-03 2016-02-11 Luca Gubert Finsterle Sound generation system with two audio channels for treating psychological/psychiatric and neurological disorders
US20140363011A1 (en) * 2013-06-05 2014-12-11 Yi Sheng Co., Ltd. Elimination system for diverting dental instrument noise
US20150304761A1 (en) * 2013-09-27 2015-10-22 Peman Montazemi Noise abatement system for dental procedures
US9609423B2 (en) * 2013-09-27 2017-03-28 Volt Analytics, Llc Noise abatement system for dental procedures
WO2021035276A1 (en) * 2019-08-23 2021-03-04 David Flint Pain management methodology

Also Published As

Publication number Publication date
BE585422A (fr) 1960-04-01
GB896423A (en) 1962-05-16
DE1303812B (de) 1973-01-18
DE1303812C2 (de) 1973-08-02
FR1240957A (fr) 1960-09-09
CH366927A (fr) 1963-01-31

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