US1784172A - Listening and selecting apparatus - Google Patents

Listening and selecting apparatus Download PDF

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Publication number
US1784172A
US1784172A US140911A US14091126A US1784172A US 1784172 A US1784172 A US 1784172A US 140911 A US140911 A US 140911A US 14091126 A US14091126 A US 14091126A US 1784172 A US1784172 A US 1784172A
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US
United States
Prior art keywords
disc
ear
listening
pad
sound
Prior art date
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Expired - Lifetime
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US140911A
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English (en)
Inventor
Bloch Andre
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Individual
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Individual
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Publication date
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Publication of US1784172A publication Critical patent/US1784172A/en
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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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1008—Earpieces of the supra-aural or circum-aural type
    • 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
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1058—Manufacture or assembly
    • H04R1/1075—Mountings of transducers in earphones or headphones
    • 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
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
    • H04R1/345—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means for loudspeakers

Definitions

  • My invention relates to a listening and selecting apparatus, which 1s characterized by the use of means enabling the proper selection of the sounds, or the observation or" any 5 given sound, by tuning the apparatus to this sound, in such manner as to reinforce it while diminishing the intensity or" prejudicial parasitic sounds.
  • the layer or cushion of air which thus forms a manometric chamber will be tuned, according to the thickness which is given to it, by suitable regulating means, to the desired sound, suspected noise, engine, propeller, human voice, or the like), or to harmonic of the sound under observation.
  • the tuning may be of an exact or a loose nature, according as the thickness to be given to the layer of air is calculated strictly or approximately.
  • the tuning may be carried out by repeated trials and may be voluntarily of a very loose nature, in the case in which the apparatus is to be used for instance for the human'voice, whose vibrations cover a certain extent in the scale of sounds, and in which the whole range is to be observed. 7
  • the apparatus comprises a disc of any suitable material provided with'a flange which is slidable with easy friction in a stationary ring surrounding the operators ear.
  • the said movable plate is pierced with an aperture for the insertion of a telephone receiver, or the end of an acoustic tube, or any other listening device in use.
  • the end of the movable part may be entirely eliminated, if the listening system employed exactly fills the space occupied by the same, and if it is movable in the same manner as the eliminated part.
  • the said pad is obviously pierced with an aper-' ture corresponding to the auditory channel.
  • the said movable part may be made stationary, or I may eliminate the stationarymember in which it is movable, so that the said pad needs only be pressed more or less against the ear in order to form a layer of air of moderate thickness, whose value can be determined by repeated trials.
  • FIG. 1 and 2 represent a constructional 7 form of my said apparatus.
  • Fig. 3 is a modification of the same I employ a disc 1 which'consists of any suitable substance and is flanged at 2, the disc having an oval or a pear shape to exactly 00- incide with the outline of the ear; said disc is slidable with easy friction in a stationary member 3 of like shape, to which is secured a pneumatic torus 4. j
  • the movable disc 1 is pierced with an aperture 6 into which is inserted the end of an acoustic tube'5 (Fig. 1), or a telephone receiver, or anyother suitable listening device.
  • a pad of cotton velvet 7 comprising a central aperture 8; this latter, when the apparatus is mounted-against the car, i. e. when the said pneumatic member surrounds the outer part ofthe ear, will fill up the cavities in the eX-, ternal ear, thus protecting itfrom all injury and offering only the layer of air which is necessary for the desired tuning.
  • the situation of the central aperture 8 of the pad 7 is so determined as to bring it into coincidence with the aperture 6 of the disc 1 whichcorrespondstotheauditorychannel.
  • I may eliminate the movable disc 1, provided the listening device which is utilized exactly fills the space occupied within the stationary member 3, and that it may be displaced in the same manner as the said movable disc.
  • the movable disc 1 is eliminated, and it is replaced by the stationary disc 9 comprising a central aperture in which is engaged the acoustic tube 5.
  • the disc 9 has secured thereto the cotton velvet pad 7, and it is mounted in any suitable manner upon the pneumatic torus Ladaptedtosurroundtheear.
  • This arrangement can be employed in the case in which the tuning is voluntarily of a loose character. It is simply necessary to 29 press to a greater or less degree upon the pad 7 in order to form in front of the ear a layer of air of medium thickness which can be regulated in a summary manner, and whose value can be found upon trial.
  • Claims 1 In apparatus of the character described, the combination with a sound conducting member, of enclosing means for surrounding the ear of the operator and connected with the so. sound conducting member for regulating at will the volume of the air cushion existing between the auditory channel ofthe operators ear and the sound conductingmember.
  • the combination with a sound conducting member of means operably associated therewith for regulating at will the volume of the air cushion existing between the auditory channel of the operators ear and the sound conducting member, said means including an apertured disc engaged with the sound conducting member, an apertured pad connected to the outer face of the disc, and a flexible torus arranged in surrounding relation with the disc.
  • An apparatus of the character described the combination with a sound conducting member, of a flanged disc having an aperture for engagement with the sound conducting 5 member, a pad on the outer face of the disc and having an aperture aligning with the aperture in the disc and adapted to be arranged opposite the auditory channel of the ear of the user, a stationary tubular member in which the flanged disc is adjustably engaged, a penumatic torus surrounding the stationary member, and the torus, tubular member and disc being of substantially oval shape so as to conform to the general contour of the ear of the user, substantially as and for the purposes set forth.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Headphones And Earphones (AREA)
US140911A 1925-10-26 1926-10-11 Listening and selecting apparatus Expired - Lifetime US1784172A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR605038T 1925-10-26

Publications (1)

Publication Number Publication Date
US1784172A true US1784172A (en) 1930-12-09

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ID=8973695

Family Applications (1)

Application Number Title Priority Date Filing Date
US140911A Expired - Lifetime US1784172A (en) 1925-10-26 1926-10-11 Listening and selecting apparatus

Country Status (3)

Country Link
US (1) US1784172A (fr)
BE (1) BE337525A (fr)
FR (1) FR605038A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2614646A (en) * 1952-10-21 Frequency receiving bell with an

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2614646A (en) * 1952-10-21 Frequency receiving bell with an

Also Published As

Publication number Publication date
BE337525A (fr)
FR605038A (fr) 1926-05-18

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