GB369745A - Improvements in or relating to loudspeaker installations provided with a filter - Google Patents

Improvements in or relating to loudspeaker installations provided with a filter

Info

Publication number
GB369745A
GB369745A GB8791/31A GB879131A GB369745A GB 369745 A GB369745 A GB 369745A GB 8791/31 A GB8791/31 A GB 8791/31A GB 879131 A GB879131 A GB 879131A GB 369745 A GB369745 A GB 369745A
Authority
GB
United Kingdom
Prior art keywords
filter
loud
speaker
amplifier
relating
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
GB8791/31A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB369745A publication Critical patent/GB369745A/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
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)

Abstract

369,745. Valve amplifying circuits; impedance networks. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, 13D, Emmasingel, Eindhoven, Holland. March 21, 1931, No. 8791. Convention date, April 24, 1930. [Classes 40 (iii) and 40 (v).] The circuit of a loud-speaker 3 capable of reproducing the whole audio-frequency range includes a filter having a characteristic curve which falls more abruptly than that of the loud-speaker in the neighbourhood of the higher audio-frequencies. The filter preferably comprises series inductance coils L coupled to each other, and shunt capacities C. It may be on the primary or secondary side of the output transformer 1, 2 of a valve amplifier, and may be embodied in the loud-speaker structure or in the amplifier.
GB8791/31A 1930-04-24 1931-03-21 Improvements in or relating to loudspeaker installations provided with a filter Expired GB369745A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL369745X 1930-04-24

Publications (1)

Publication Number Publication Date
GB369745A true GB369745A (en) 1932-03-31

Family

ID=19785527

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8791/31A Expired GB369745A (en) 1930-04-24 1931-03-21 Improvements in or relating to loudspeaker installations provided with a filter

Country Status (2)

Country Link
FR (1) FR713426A (en)
GB (1) GB369745A (en)

Also Published As

Publication number Publication date
FR713426A (en) 1931-10-27

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