US2106813A - Acoustic device - Google Patents

Acoustic device Download PDF

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Publication number
US2106813A
US2106813A US729759A US72975934A US2106813A US 2106813 A US2106813 A US 2106813A US 729759 A US729759 A US 729759A US 72975934 A US72975934 A US 72975934A US 2106813 A US2106813 A US 2106813A
Authority
US
United States
Prior art keywords
diaphragm
screen
microphone
casing
sound
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
US729759A
Other languages
English (en)
Inventor
Frank F Romanow
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.)
AT&T Corp
Original Assignee
Bell Telephone Laboratories Inc
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
Priority to BE409777D priority Critical patent/BE409777A/xx
Application filed by Bell Telephone Laboratories Inc filed Critical Bell Telephone Laboratories Inc
Priority to US729759A priority patent/US2106813A/en
Application granted granted Critical
Publication of US2106813A publication Critical patent/US2106813A/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 

Definitions

  • Fig. 5 is a side elevational view of another acoustic device embodying this invention, partly broken away;

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
US729759A 1934-06-09 1934-06-09 Acoustic device Expired - Lifetime US2106813A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BE409777D BE409777A (ja) 1934-06-09
US729759A US2106813A (en) 1934-06-09 1934-06-09 Acoustic device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US729759A US2106813A (en) 1934-06-09 1934-06-09 Acoustic device

Publications (1)

Publication Number Publication Date
US2106813A true US2106813A (en) 1938-02-01

Family

ID=24932491

Family Applications (1)

Application Number Title Priority Date Filing Date
US729759A Expired - Lifetime US2106813A (en) 1934-06-09 1934-06-09 Acoustic device

Country Status (2)

Country Link
US (1) US2106813A (ja)
BE (1) BE409777A (ja)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2806544A (en) * 1953-10-15 1957-09-17 Albert L Witchey Sound sources for microphone calibration
US4057124A (en) * 1975-12-30 1977-11-08 Braden Harold C Sound suppressor
US4832150A (en) * 1986-07-28 1989-05-23 Gunter Just Sound-permeable cover for a loudspeaker
US5038459A (en) * 1987-03-04 1991-08-13 Hosiden Electronics Co., Ltd. Method of fabricating the diaphragm unit of a condenser microphone by electron beam welding
US5400413A (en) * 1992-10-09 1995-03-21 Dana Innovations Pre-formed speaker grille cloth
US20090010472A1 (en) * 2007-07-02 2009-01-08 Chin-Kuo Chiu Acoustical grille free from spit moisture maintains frequency to keep realistic and natural sounds
US7946379B1 (en) * 2006-07-03 2011-05-24 Michael Frenchik Filter assembly
USD878339S1 (en) * 2018-01-09 2020-03-17 Ching-Wen Chen Microphone
USD901459S1 (en) * 2020-07-15 2020-11-10 Yang Zhao Microphone pop filter
USD951234S1 (en) * 2019-09-20 2022-05-10 Apple Inc. Earphone
USD991229S1 (en) * 2021-09-22 2023-07-04 Shenzhen Lanque Shangpin Trading Co., Ltd. Microphone set

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2806544A (en) * 1953-10-15 1957-09-17 Albert L Witchey Sound sources for microphone calibration
US4057124A (en) * 1975-12-30 1977-11-08 Braden Harold C Sound suppressor
US4832150A (en) * 1986-07-28 1989-05-23 Gunter Just Sound-permeable cover for a loudspeaker
US5038459A (en) * 1987-03-04 1991-08-13 Hosiden Electronics Co., Ltd. Method of fabricating the diaphragm unit of a condenser microphone by electron beam welding
US5400413A (en) * 1992-10-09 1995-03-21 Dana Innovations Pre-formed speaker grille cloth
US7946379B1 (en) * 2006-07-03 2011-05-24 Michael Frenchik Filter assembly
US20090010472A1 (en) * 2007-07-02 2009-01-08 Chin-Kuo Chiu Acoustical grille free from spit moisture maintains frequency to keep realistic and natural sounds
USD878339S1 (en) * 2018-01-09 2020-03-17 Ching-Wen Chen Microphone
USD951234S1 (en) * 2019-09-20 2022-05-10 Apple Inc. Earphone
USD901459S1 (en) * 2020-07-15 2020-11-10 Yang Zhao Microphone pop filter
USD991229S1 (en) * 2021-09-22 2023-07-04 Shenzhen Lanque Shangpin Trading Co., Ltd. Microphone set

Also Published As

Publication number Publication date
BE409777A (ja)

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