US1829909A - Stringed loud speaker - Google Patents

Stringed loud speaker Download PDF

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Publication number
US1829909A
US1829909A US321256A US32125628A US1829909A US 1829909 A US1829909 A US 1829909A US 321256 A US321256 A US 321256A US 32125628 A US32125628 A US 32125628A US 1829909 A US1829909 A US 1829909A
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US
United States
Prior art keywords
strings
diaphragm
stringed
loud speaker
loudspeaker
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 - Lifetime
Application number
US321256A
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English (en)
Inventor
Midhat Chakir
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US1829909A publication Critical patent/US1829909A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G7/00—Distillation of hydrocarbon oils
    • 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 
    • H04R1/225—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only  for telephonic receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones

Definitions

  • the chief objections to the loudspeakers hitherto generally in use consist in that the harmonious upper oscillations are not well reproduced.
  • the better loudspeakers reproduce the fundamental tones of the hearing range comparatively uniformly to the ear, but the harmonics, especially those of high frequencies, are very inadequately reproduced or not reproduced at all.
  • the result of this imperfect reproduction of the harmonics is that all loudspeakers reproduce music peculiarly dull and lifeless, lacking the fineness and characteristic timbre of the original rendering.
  • Figure l is a front-view of a loudspeaker designed according to this invention
  • Figure 2 is a vertical cross-section through the same.
  • a plurality of strings 5 of different thickness is stretched so that they are fastened each at one end on the sounding boX ⁇ 7 and at the other end to a centrally' situated, freely suspended disc 1.
  • This disk is coupled with ⁇ the movable part of the driving unit 2 which may be either electromagnetic or electro-dynamic. If a modulated current flows through the loudspeaker, only those strings are set in resonance oscillation, of which the fundamental oscillation or one of the harmonics corresponds to the actual oscillating frequency of 1 the driving unit. If the frequency changes, the strings set in oscillation will thereby be immediately damped automatically. Therefore, no detrimental after-oscillation of the strings takes place.
  • This connecting member l need not absolutely be a circular disk as shown in the drawings, but may be of any suitable shape.
  • a loudspeaker made in this manner, having a suilicient number of strings, can also be used for reproducing music without anyy diaphragm whatever.
  • this form of construction is naturally actually suitable merely for the reproduction of string instruments, it can only be used for special purposes.
  • a diaphragm 3 of conical shape is shown in dotted lines, which diaphragm, as also the central disk 1, is coupled with the driving unit.
  • This form of construction is capable of reproducing all kinds of musical renderings in a very true manner.
  • the diaphragm and the system of strings can oscillate absolutely independently the one from the other, they do not distract each other but supplement each other, in a very eflicient manner.
  • the strings serve chiefly only to produce harmonics, their number need not be very large., because in the oscillation of each string, as is known, a very large number of harmonics occur. Therefore, a comparatively small number of strings (say from l() to 20) will suffice in order to give the necessarytimbre to the fundamental tones produced byy the diaphragm.
  • the strings only have a slightly distracting eiect with loud reproductions of speech. Therefore, it is advisable to provide some suitable device in order to damp or liberate the str-ings, as desired.
  • a loudspeaker comprising, in combination, a resonance body a plurality of strings stretched over a Wall of said body and being attached at one end to it; a freely suspended disk connected With the other ends of said strings, a driving unit coupled to said disk and being adapted to cause the strings to oscillate, substantially as set forth.
  • a loudspeaker comprising, in combination, a resonance body provided with a wall,

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Multimedia (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Toys (AREA)
US321256A 1928-05-18 1928-11-22 Stringed loud speaker Expired - Lifetime US1829909A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1829909X 1928-05-18

Publications (1)

Publication Number Publication Date
US1829909A true US1829909A (en) 1931-11-03

Family

ID=7745104

Family Applications (1)

Application Number Title Priority Date Filing Date
US321256A Expired - Lifetime US1829909A (en) 1928-05-18 1928-11-22 Stringed loud speaker

Country Status (2)

Country Link
US (1) US1829909A (de)
DE (1) DE554474C (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3347337A (en) * 1966-05-16 1967-10-17 Nippon Musical Instruments Mfg Reverberation loudspeaker

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3347337A (en) * 1966-05-16 1967-10-17 Nippon Musical Instruments Mfg Reverberation loudspeaker

Also Published As

Publication number Publication date
DE554474C (de) 1932-07-08

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