DE310319C - - Google Patents

Info

Publication number
DE310319C
DE310319C DENDAT310319D DE310319DA DE310319C DE 310319 C DE310319 C DE 310319C DE NDAT310319 D DENDAT310319 D DE NDAT310319D DE 310319D A DE310319D A DE 310319DA DE 310319 C DE310319 C DE 310319C
Authority
DE
Germany
Prior art keywords
membrane
electrodes
grains
coal
microphone
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.)
Active
Application number
DENDAT310319D
Other languages
German (de)
English (en)
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.)
Publication of DE310319C publication Critical patent/DE310319C/de
Active legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R21/00—Variable-resistance transducers
    • H04R21/02—Microphones
    • H04R21/021—Microphones with granular resistance material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41B—MACHINES OR ACCESSORIES FOR MAKING, SETTING, OR DISTRIBUTING TYPE; TYPE; PHOTOGRAPHIC OR PHOTOELECTRIC COMPOSING DEVICES
    • B41B11/00—Details of, or accessories for, machines for mechanical composition using matrices for individual characters which are selected and assembled for type casting or moulding
    • B41B11/18—Devices or arrangements for assembling matrices and space bands

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Mechanical Operated Clutches (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Preliminary Treatment Of Fibers (AREA)
DENDAT310319D 1913-04-12 Active DE310319C (https=)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US191405174XA 1913-04-12 1913-04-12

Publications (1)

Publication Number Publication Date
DE310319C true DE310319C (https=)

Family

ID=32597441

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT310319D Active DE310319C (https=) 1913-04-12

Country Status (2)

Country Link
DE (1) DE310319C (https=)
GB (1) GB191405174A (https=)

Also Published As

Publication number Publication date
GB191405174A (en) 1915-02-25

Similar Documents

Publication Publication Date Title
DE1967130C2 (de) Mechanisch-elektrisch bzw. elektrisch-mechanischer Wandler
DE19739877A1 (de) Mechanischer Resonator mit variabler Resonanzfrequenz
DE2609884B2 (de) Filter auf der Basis der akustischen Oberflächenwellen
DE2035629B2 (de) Piezoelektroakustischer wandler
DE310319C (https=)
DE2231467B2 (de) Piezoelektrische Anordnung und Verfahren zur Vermeidung von Ubersprechkapazitäten
DE3532615A1 (de) Anordnung in einem hydrophon
DE69007766T2 (de) Tieffrequenzhydrophon und Sonarantenne mit solchen Hydrophonen.
DE1916847A1 (de) Ultraschallwandler
DE3013684C2 (de) Klopfsensor
DE2155026A1 (de) Niederfrequenzkondensator-mikrofon hoher linearitaet
DE3013788C2 (de) Piezokeramikscheibe für einen Signalgeber zur Erzeugung eines akustischen Signals
DE2165143B2 (de) Elektrodenanordnung für einen stabförmigen, piezoelektrischen Biegungsschwinger
DE1948095A1 (de) Wandler zur Umwandlung von akustischen Schwingungen in elektrische Schwingungen und umgekehrt in Form einer Membran mit mindestens einer Schicht aus piezoelektrischem Material
DE3022770C2 (de) Piezokeramischer Körperschallwandler
DE3126676C2 (https=)
AT388071B (de) Tonabnehmer zur anbringung an musikinstrumenten
DE3341349A1 (de) Hydrophon zur messung der schwingungsschnelle
AT73948B (de) Mikrophon.
DE940654C (de) Koernermikrophon
DE563428C (de) Verfahren zum Untersuchen von akustischen Flaechenstrahlern, insbesondere Geigen u. dgl.
DE1287135B (de) Elektroakustischer Wandler mit einer Schicht aus Halbleitermaterial bedeckten Membran
DE374594C (de) Hammerkopf fuer Schlaginstrumente (Klaviere, Fluegel u. dgl.)
DE2920087C2 (de) Tastatur für ein Dateneingabegerät o.dgl
AT249400B (de) Piezoelektrischer Wandler