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GB229706A - Improvements in electro-acoustic devices - Google Patents

Improvements in electro-acoustic devices

Info

Publication number
GB229706A
GB229706A GB498925A GB498925A GB229706A GB 229706 A GB229706 A GB 229706A GB 498925 A GB498925 A GB 498925A GB 498925 A GB498925 A GB 498925A GB 229706 A GB229706 A GB 229706A
Authority
GB
United Kingdom
Prior art keywords
low
windings
valve
electro
impedances
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
GB498925A
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
Priority to GB498925A priority Critical patent/GB229706A/en
Publication of GB229706A publication Critical patent/GB229706A/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 
    • H04R1/24—Structural combinations of separate transducers or of two parts of the same transducer and responsive respectively to two or more frequency ranges

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

229,706. Marconi's Wireless Telegraph Co., Ltd., (Minton, J. P., and Ringel, A. S.). Feb. 23, 1925. Thermionic amplifiers.-In a loud speaker comprising tw( units responsive respectively to high and low tones, the windings 1, 2 of the low anc high frequency units are . con nected through the low-pass and high-pass filters 5, 6 to the output circuit of a valve, and the windings have impedances substantially equal to the impedances of the valve at low and high frequencies respectively. Specification 215,104 is referred to.
GB498925A 1925-02-23 1925-02-23 Improvements in electro-acoustic devices Expired GB229706A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB498925A GB229706A (en) 1925-02-23 1925-02-23 Improvements in electro-acoustic devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB498925A GB229706A (en) 1925-02-23 1925-02-23 Improvements in electro-acoustic devices

Publications (1)

Publication Number Publication Date
GB229706A true GB229706A (en) 1926-03-18

Family

ID=9787621

Family Applications (1)

Application Number Title Priority Date Filing Date
GB498925A Expired GB229706A (en) 1925-02-23 1925-02-23 Improvements in electro-acoustic devices

Country Status (1)

Country Link
GB (1) GB229706A (en)

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