IL54206A0 - Process for the preparation of , -dialkoxycarboxylic acid derivatives - Google Patents

Process for the preparation of , -dialkoxycarboxylic acid derivatives

Info

Publication number
IL54206A0
IL54206A0 IL54206A IL5420678A IL54206A0 IL 54206 A0 IL54206 A0 IL 54206A0 IL 54206 A IL54206 A IL 54206A IL 5420678 A IL5420678 A IL 5420678A IL 54206 A0 IL54206 A0 IL 54206A0
Authority
IL
Israel
Prior art keywords
dialkoxycarboxylic
preparation
acid derivatives
derivatives
acid
Prior art date
Application number
IL54206A
Original Assignee
Hoechst Ag
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 Hoechst Ag filed Critical Hoechst Ag
Publication of IL54206A0 publication Critical patent/IL54206A0/en

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
    • H04R5/00—Stereophonic arrangements
    • H04R5/02—Spatial or constructional arrangements of loudspeakers
    • 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 
    • H04R1/227—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only  using transducers reproducing the same frequency band

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Stereophonic System (AREA)
IL54206A 1977-03-08 1978-03-06 Process for the preparation of , -dialkoxycarboxylic acid derivatives IL54206A0 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19772709952 DE2709952A1 (en) 1977-03-08 1977-03-08 Stereo loudspeaker system with two boxes - has two oppositely directed speakers with opposite polarity per box, with each box placed in front of reflecting wall

Publications (1)

Publication Number Publication Date
IL54206A0 true IL54206A0 (en) 1978-06-15

Family

ID=6003017

Family Applications (1)

Application Number Title Priority Date Filing Date
IL54206A IL54206A0 (en) 1977-03-08 1978-03-06 Process for the preparation of , -dialkoxycarboxylic acid derivatives

Country Status (2)

Country Link
DE (1) DE2709952A1 (en)
IL (1) IL54206A0 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4249037A (en) * 1978-11-08 1981-02-03 Dexter John L Pyramid loudspeakers with twin cross-phased mid-range speakers
US4369335A (en) * 1980-07-21 1983-01-18 Petroff Michael L Two-channel, four loudspeaker-component enhanced sterophonic system
US4596034A (en) * 1981-01-02 1986-06-17 Moncrieff J Peter Sound reproduction system and method
US5553147A (en) * 1993-05-11 1996-09-03 One Inc. Stereophonic reproduction method and apparatus

Also Published As

Publication number Publication date
DE2709952A1 (en) 1978-09-14

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