ES172358A1 - Mejoras en microteléfonos - Google Patents

Mejoras en microteléfonos

Info

Publication number
ES172358A1
ES172358A1 ES172358A ES172358A ES172358A1 ES 172358 A1 ES172358 A1 ES 172358A1 ES 172358 A ES172358 A ES 172358A ES 172358 A ES172358 A ES 172358A ES 172358 A1 ES172358 A1 ES 172358A1
Authority
ES
Spain
Prior art keywords
microphones
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
ES172358A
Other languages
English (en)
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.)
Nokia Spain SA
Original Assignee
Alcatel Espana SA
Standard Electrica SA
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 Alcatel Espana SA, Standard Electrica SA filed Critical Alcatel Espana SA
Publication of ES172358A1 publication Critical patent/ES172358A1/es
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
    • H04R19/00—Electrostatic transducers
    • H04R19/04—Microphones
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
    • G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Vibration Prevention Devices (AREA)
ES172358A 1943-11-02 1946-01-29 Mejoras en microteléfonos Expired ES172358A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB254839X 1943-11-02

Publications (1)

Publication Number Publication Date
ES172358A1 true ES172358A1 (es) 1946-03-01

Family

ID=10228438

Family Applications (1)

Application Number Title Priority Date Filing Date
ES172358A Expired ES172358A1 (es) 1943-11-02 1946-01-29 Mejoras en microteléfonos

Country Status (3)

Country Link
US (1) US2523341A (es)
CH (1) CH254839A (es)
ES (1) ES172358A1 (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113596691A (zh) * 2021-07-14 2021-11-02 王丁宁 一种带有被动辐射结构的空心静电扬声器

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2935681A (en) * 1956-08-31 1960-05-03 Gen Electric Contour measuring method and probe

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1746171A (en) * 1927-01-31 1930-02-04 Vatinet Henri Victor Eugene Apparatus for revealing shocks in any moving mechanism
US2037255A (en) * 1931-03-21 1936-04-14 United Res Corp Electromagnetic translating device
US2041710A (en) * 1931-05-27 1936-05-26 Harvey C Hayes Sound detecting apparatus
NL79628B (es) * 1935-10-17
US2305267A (en) * 1939-08-05 1942-12-15 Glenn L Martin Co Vibration measuring apparatus
US2257187A (en) * 1939-12-21 1941-09-30 Geophysical Res Corp Seismic surveying
US2288838A (en) * 1940-02-29 1942-07-07 Rca Corp Vibration pickup device
US2309560A (en) * 1940-03-18 1943-01-26 Olive S Petty Method and apparatus for measuring and recording vibrational effects
US2361990A (en) * 1943-04-15 1944-11-07 Western Electric Co Vibration analyzer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113596691A (zh) * 2021-07-14 2021-11-02 王丁宁 一种带有被动辐射结构的空心静电扬声器
CN113596691B (zh) * 2021-07-14 2023-06-23 王丁宁 一种带有被动辐射结构的空心静电扬声器

Also Published As

Publication number Publication date
US2523341A (en) 1950-09-26
CH254839A (de) 1948-05-31

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