GB726247A - Improvements in or relating to acoustic resistors - Google Patents

Improvements in or relating to acoustic resistors

Info

Publication number
GB726247A
GB726247A GB8900/53A GB890053A GB726247A GB 726247 A GB726247 A GB 726247A GB 8900/53 A GB8900/53 A GB 8900/53A GB 890053 A GB890053 A GB 890053A GB 726247 A GB726247 A GB 726247A
Authority
GB
United Kingdom
Prior art keywords
tape
resistor
acoustic
relating
acoustic resistors
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
GB8900/53A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries Ltd
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 Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB726247A publication Critical patent/GB726247A/en
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
    • 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 

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
GB8900/53A 1952-04-03 1953-03-31 Improvements in or relating to acoustic resistors Expired GB726247A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL726247X 1952-04-03

Publications (1)

Publication Number Publication Date
GB726247A true GB726247A (en) 1955-03-16

Family

ID=19817821

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8900/53A Expired GB726247A (en) 1952-04-03 1953-03-31 Improvements in or relating to acoustic resistors

Country Status (5)

Country Link
US (1) US2778440A (instruction)
BE (1) BE518909A (instruction)
DE (1) DE931055C (instruction)
GB (1) GB726247A (instruction)
NL (1) NL83991C (instruction)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1488565A (en) * 1919-07-11 1924-04-01 George W Stewart Porous damper for acoustical instruments
US1975637A (en) * 1930-05-30 1934-10-02 Paraffine Co Inc Acoustical material
US1954966A (en) * 1931-01-31 1934-04-17 Bell Telephone Labor Inc Sound translating device
US2065751A (en) * 1935-12-31 1936-12-29 Rca Corp Acoustic resistance device
US2126254A (en) * 1936-12-23 1938-08-09 Ernest E Gowell Rug and method of making the same
US2656585A (en) * 1948-04-13 1953-10-27 Neisler Mills Inc Plied yarn and plied yarn fabric and method of making same

Also Published As

Publication number Publication date
NL83991C (instruction)
DE931055C (de) 1955-08-01
US2778440A (en) 1957-01-22
BE518909A (instruction)

Similar Documents

Publication Publication Date Title
GB512242A (en) Magneto strictive devices and electrical and electro-mechanical systems therefor
ES8204902A1 (es) Un transductor electroacustico
US3668321A (en) Magnetic coupler
GB726247A (en) Improvements in or relating to acoustic resistors
GB445935A (en) An improved sound reproducing device
GB943321A (en) Improvements in earphones
GB776280A (en) Improvements in or relating to moving coil loudspeakers and microphones
GB528400A (en) Electro-acoustic devices
GB732388A (en) Twin unit stethoscope headphones
JPS5312320A (en) Mfb circuit
GB742889A (en) Improvements in or relating to loud speakers and like electro-acoustic transducers
GB709902A (en) Improvements in conductor devices having a variable electric resistance
GB464418A (en) Improvements in or relating to sound reproducing apparatus
GB589918A (en) Improvements in telephone relaying and amplifying means for the aid of deaf or like persons
GB584354A (en) Improvements relating to electro-dynamic reproducers or loud-speaking telephones of the moving coil type
GB725182A (en) Improvements in or relating to moving coil loudspeakers
GB857413A (en) Improvements in or relating to cone loudspeakers
US1735873A (en) Sound-regenerating device
GB1016298A (en) Stereophonic pick-up cartridge
GB779156A (en) A remote control device for use with apparatus incorporating a loud speaker
JPS5325419A (en) Speaker
GB447846A (en) Improvements in and relating to moving-coil loud speakers
ES307008A2 (es) Aparato electroautomatico para la direccion a distancia por el sonido
GB292414A (en) A speaking automaton
JPS5421324A (en) Electrostatic type electro-acoustic transducer