EP2928209A1 - Système permettant d'acquérir des données représentant le son dans un corps humain ou animal - Google Patents

Système permettant d'acquérir des données représentant le son dans un corps humain ou animal Download PDF

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Publication number
EP2928209A1
EP2928209A1 EP14163198.6A EP14163198A EP2928209A1 EP 2928209 A1 EP2928209 A1 EP 2928209A1 EP 14163198 A EP14163198 A EP 14163198A EP 2928209 A1 EP2928209 A1 EP 2928209A1
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EP
European Patent Office
Prior art keywords
piezoelectric element
human
sound
electrical signal
animal
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.)
Withdrawn
Application number
EP14163198.6A
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German (de)
English (en)
Inventor
Adrian Paul Harrison
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.)
Myodynamik Aps
Original Assignee
Myodynamik Aps
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Filing date
Publication date
Application filed by Myodynamik Aps filed Critical Myodynamik Aps
Priority to EP14163198.6A priority Critical patent/EP2928209A1/fr
Publication of EP2928209A1 publication Critical patent/EP2928209A1/fr
Withdrawn legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers
    • H04R17/005—Piezoelectric transducers; Electrostrictive transducers using a piezoelectric polymer
    • 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
    • H04R1/46—Special adaptations for use as contact microphones, e.g. on musical instrument, on stethoscope

Definitions

  • the invention relates to recording, measurement and analysis of sounds in human and animal bodies.
  • Sound in human and animal bodies is vibrations, which propagate in the tissue.
  • the vibrations can be picked up by a transducer, which generates and outputs an electrical signal representing the vibrations.
  • the sounds are vibrations with frequencies below, in or above the range of audible frequencies, such as from a few Hz or a fraction of one Hz up to several tens of kHz and possibly 100 kHz or more. Such wide frequency bands are yet relatively unexplored.
  • Audible sounds in human and animal bodies can be picked up by a stethoscope placed on the skin of the body and listened to.
  • Stethoscopes range from simple tubular devices as a transmission medium from the skin to the ear of the person listening to the sounds, and to advanced electronic devices with an electroacoustic transducer and one or more connected devices for recording and analysing the signals representing the sounds in the body. Sounds from organs like heart and lungs typically have a maximum frequency of a few kHz.
  • AMG acoustic myography
  • WO 2004/002191 A1 discloses an electronic stethoscope with a piezoelectric element in a housing with a noise attenuation arrangement.
  • the invention aims at evaluating whether the recorded signal could be used to determine coordination, as well as aspects of muscle function, in physically active human subjects with a view to its application in clinical practice.
  • the invention provides a system for acquiring data representing sound in a human or animal body, the system comprising a disk shaped piezoelectric element with a first side and a second side opposite the first side, the piezoelectric element being capable of generating, when exposed to the sound, an electrical signal representing the sound, wherein the first side is adapted for placing in acoustic contact with the skin of an animal or a human being, and the second side is directly exposed to ambient air, and a device for receiving the electrical signal generated by the piezoelectric element.
  • a disk shaped piezoelectric element with a first side and a second side opposite the first side, the piezoelectric element being capable of generating, when exposed to the sound, an electrical signal representing the sound, wherein the first side is adapted for placing in acoustic contact with the skin of an animal or a human being, and the second side is directly exposed to ambient air, and a device for receiving the electrical signal generated by the piezoelectric element.
  • the first and second sides of the piezoelectric element are covered by a protective coating, which protects the piezoelectric element from being damaged by e.g. scratches and influenced by fluids such as acoustic contact gel.
  • the protective coating is a thin sheet of a rubber-like substance, which is transparent to the sounds to be picked up by the piezoelectric element.
  • FIG 1 a system 10 for acquiring data representing sound in a human or animal body.
  • the system 10 has an analyser 20 with a disk shaped piezoelectric element 30 electrically connected to the analyser 20. Also in figure 1 is shown the piezoelectric element 30 seen from its edge to show that the piezoelectric element 30 has a first side 31 and a second side 32 opposite the first side 31.
  • the first side 31 is adapted for placing in acoustic contact with the skin of an animal or a human being, and the second side 32 is directly exposed to ambient air.
  • the piezoelectric element 30 When the piezoelectric element 30 is placed in acoustic contact with the skin of an animal or a human being the piezoelectric element 30 will receive sound originating from the body of the animal or a human being, and the sound signals will cause the piezoelectric element 30 to generate an analogue electrical signal representing the sound.
  • the analyser 20 receives electrical signal from the piezoelectric element 30 and records, processes and/or analyses the electrical signals.
  • the analyser 20 performs a sampling of the received electrical signal.
  • AMG signals turn out to have content of high frequencies up to several tens of kHz, and it is therefore important to use a corresponding high sampling frequency in the analogue-to-digital conversion of the analogue electrical signals representing the sound in the animal or human body in order to avoid losing information of interest. It has been found that sampling frequencies as high as 22, 44 and 96 kHz or even higher can provide useful information about both short and long muscle fibres.
  • Figure 2 is a typical AMG and sEMG trace obtained from a healthy subject.
  • Figure 3 is a graph of an AMG signal from m. biceps femoris showing the response to an arm lift without a weight (upper panel), an arm lift with a weight (middle panel), and the signal obtained when the arm is passively lifted by another individual (lower panel).
  • the invention can be used both on humans and on small as well as larger animals such as horses where non-invasive studies of their skeletal muscles can give useful information, which can be used e.g. in breeding horses for equestrian sports.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Measuring And Recording Apparatus For Diagnosis (AREA)
EP14163198.6A 2014-04-02 2014-04-02 Système permettant d'acquérir des données représentant le son dans un corps humain ou animal Withdrawn EP2928209A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14163198.6A EP2928209A1 (fr) 2014-04-02 2014-04-02 Système permettant d'acquérir des données représentant le son dans un corps humain ou animal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14163198.6A EP2928209A1 (fr) 2014-04-02 2014-04-02 Système permettant d'acquérir des données représentant le son dans un corps humain ou animal

Publications (1)

Publication Number Publication Date
EP2928209A1 true EP2928209A1 (fr) 2015-10-07

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP14163198.6A Withdrawn EP2928209A1 (fr) 2014-04-02 2014-04-02 Système permettant d'acquérir des données représentant le son dans un corps humain ou animal

Country Status (1)

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EP (1) EP2928209A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6028942A (en) * 1997-02-20 2000-02-22 Greenberger; Hal P. Stethoscope with reduced susceptibility to interference from ambient noise
WO2004002191A1 (fr) 2002-06-21 2003-12-31 Bang & Olufsen Medicom A/S Transducteur pour signaux bioacoustiques
WO2011123071A1 (fr) * 2010-03-31 2011-10-06 Nanyang Technological University Capteur de conduction aérienne, et système et procédé pour la surveillance d'un état de santé

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6028942A (en) * 1997-02-20 2000-02-22 Greenberger; Hal P. Stethoscope with reduced susceptibility to interference from ambient noise
WO2004002191A1 (fr) 2002-06-21 2003-12-31 Bang & Olufsen Medicom A/S Transducteur pour signaux bioacoustiques
WO2011123071A1 (fr) * 2010-03-31 2011-10-06 Nanyang Technological University Capteur de conduction aérienne, et système et procédé pour la surveillance d'un état de santé

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
"Heart monitor and final result", 21 February 2013 (2013-02-21), XP055133211, Retrieved from the Internet <URL:http://301realtime.blogspot.nl/> [retrieved on 20140805] *
"Saumanahaii discussions", 1 July 2013 (2013-07-01), XP055133226, Retrieved from the Internet <URL:http://discuss.biohack.me/profile/discussions/707/Saumanahaii> [retrieved on 20140805] *
BERNARD GRUNDLEHNER ET AL: "Methods to Characterize Sensors for Capturing Body Sounds", BODY SENSOR NETWORKS (BSN), 2011 INTERNATIONAL CONFERENCE ON, IEEE, 23 May 2011 (2011-05-23), pages 59 - 64, XP031896429, ISBN: 978-1-4577-0469-7, DOI: 10.1109/BSN.2011.22 *
SAUMANAHAII: "Subdermal bone conduction headphones?", 1 July 2013 (2013-07-01), XP055133222, Retrieved from the Internet <URL:http://discuss.biohack.me/discussion/252/subdermal-bone-conduction-headphoness#Item_33> [retrieved on 20140805] *

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