US3685609A - Loudspeaker - Google Patents

Loudspeaker Download PDF

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Publication number
US3685609A
US3685609A US69269A US3685609DA US3685609A US 3685609 A US3685609 A US 3685609A US 69269 A US69269 A US 69269A US 3685609D A US3685609D A US 3685609DA US 3685609 A US3685609 A US 3685609A
Authority
US
United States
Prior art keywords
dish
channel
shaped parts
acoustic
throat
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
US69269A
Other languages
English (en)
Inventor
Nico Valentinus Franssen
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.)
US Philips Corp
Original Assignee
US Philips Corp
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 US Philips Corp filed Critical US Philips Corp
Application granted granted Critical
Publication of US3685609A publication Critical patent/US3685609A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 
    • H04R1/30—Combinations of transducers with horns, e.g. with mechanical matching means, i.e. front-loaded horns

Definitions

  • the invention relates to a device for converting acoustic vibrations into electrical oscillations and con versely, comprising at least one vibrating system having a diaphragm which is connected to a sound channel the largest geometrical dimension of which is smaller than the corresponding acoustic length.
  • the junction will be located at the mouth. At this location the depths of the grooves are very small and they progressively increase from the mouth for a large part of the grooves.
  • the part 1 has a domed central portion 10.
  • the sound reaches an annular very narrow throat 11.
  • the dish-shaped parts 1 and 2 are designed so that they define an annular sound channel 12 the cross-sectional area of which increases exponentially with axial distance.

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
US69269A 1969-09-18 1970-09-03 Loudspeaker Expired - Lifetime US3685609A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6914204A NL6914204A (fr) 1969-09-18 1969-09-18

Publications (1)

Publication Number Publication Date
US3685609A true US3685609A (en) 1972-08-22

Family

ID=19807933

Family Applications (1)

Application Number Title Priority Date Filing Date
US69269A Expired - Lifetime US3685609A (en) 1969-09-18 1970-09-03 Loudspeaker

Country Status (7)

Country Link
US (1) US3685609A (fr)
JP (1) JPS511123B1 (fr)
CH (1) CH527537A (fr)
DE (1) DE2043319B2 (fr)
FR (1) FR2061790B3 (fr)
GB (1) GB1328538A (fr)
NL (1) NL6914204A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4903308A (en) * 1988-02-10 1990-02-20 Linaeum Corporation Audio transducer with controlled flexibility diaphragm
US5198624A (en) * 1988-02-10 1993-03-30 Linaeum Corporation Audio transducer with controlled flexibility diaphragm
US6061461A (en) * 1998-05-08 2000-05-09 Paddock; Paul W. Audio transducer
US11551661B2 (en) * 2018-03-07 2023-01-10 Korea Institute Of Machinery & Materials Directional sound device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1592246A (en) * 1976-09-23 1981-07-01 Isaac T P Sound projection system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1810708A (en) * 1929-01-09 1931-06-16 Echodon Inc Method of and apparatus for amplifying and projecting sound waves
US2956636A (en) * 1956-06-11 1960-10-18 Sipko L Boersma Loudspeaker

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1810708A (en) * 1929-01-09 1931-06-16 Echodon Inc Method of and apparatus for amplifying and projecting sound waves
US2956636A (en) * 1956-06-11 1960-10-18 Sipko L Boersma Loudspeaker

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4903308A (en) * 1988-02-10 1990-02-20 Linaeum Corporation Audio transducer with controlled flexibility diaphragm
US5198624A (en) * 1988-02-10 1993-03-30 Linaeum Corporation Audio transducer with controlled flexibility diaphragm
US6061461A (en) * 1998-05-08 2000-05-09 Paddock; Paul W. Audio transducer
US11551661B2 (en) * 2018-03-07 2023-01-10 Korea Institute Of Machinery & Materials Directional sound device

Also Published As

Publication number Publication date
DE2043319B2 (de) 1976-01-15
DE2043319A1 (de) 1971-04-01
CH527537A (de) 1972-08-31
GB1328538A (en) 1973-08-30
JPS511123B1 (fr) 1976-01-14
FR2061790B3 (fr) 1973-06-08
NL6914204A (fr) 1971-03-22
FR2061790A7 (fr) 1971-06-25

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