GB191102985A - Improvements in Acoustical Instruments. - Google Patents

Improvements in Acoustical Instruments.

Info

Publication number
GB191102985A
GB191102985A GB191102985DA GB191102985A GB 191102985 A GB191102985 A GB 191102985A GB 191102985D A GB191102985D A GB 191102985DA GB 191102985 A GB191102985 A GB 191102985A
Authority
GB
United Kingdom
Prior art keywords
equal
cylindrical sections
acoustical instruments
acoustical
instruments
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.)
Expired
Application number
Inventor
Louis Lumiere
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of GB191102985A publication Critical patent/GB191102985A/en
Expired legal-status Critical Current

Links

Classifications

    • 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 
    • H04R1/30—Combinations of transducers with horns, e.g. with mechanical matching means, i.e. front-loaded horns

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)

Abstract

2985. LumiÞre, L. March 3, 1910, [Convention date]. Stethoscopes. - The mouthpiece of a stethoscope or the like having a stationary wall band a rigid movable wall e connected by a flexible material as described in Specification 27,945/10 has the contours of the two walls so shaped that the surfaces of cylindrical sections concentric with the air-exit axis are all equal. Thus the surfaces of the cylindrical sections D<1> H<1>, D<2> H<2>, and D<3> H<3> are all equal.
GB191102985D 1910-03-03 1911-02-06 Improvements in Acoustical Instruments. Expired GB191102985A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR191102985X 1910-03-03

Publications (1)

Publication Number Publication Date
GB191102985A true GB191102985A (en) 1912-02-01

Family

ID=32480888

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191102985D Expired GB191102985A (en) 1910-03-03 1911-02-06 Improvements in Acoustical Instruments.

Country Status (1)

Country Link
GB (1) GB191102985A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106456104A (en) * 2014-04-16 2017-02-22 邦吉欧维声学有限公司 Device for wide-band auscultation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106456104A (en) * 2014-04-16 2017-02-22 邦吉欧维声学有限公司 Device for wide-band auscultation

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