GB317560A - Apparatus for diagnosing and correcting defective hearing - Google Patents

Apparatus for diagnosing and correcting defective hearing

Info

Publication number
GB317560A
GB317560A GB15933/28A GB1593328A GB317560A GB 317560 A GB317560 A GB 317560A GB 15933/28 A GB15933/28 A GB 15933/28A GB 1593328 A GB1593328 A GB 1593328A GB 317560 A GB317560 A GB 317560A
Authority
GB
United Kingdom
Prior art keywords
sounds
filter
diagnosing
correcting defective
sensitive
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
GB15933/28A
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.)
Siemens and Halske AG
Siemens AG
Original Assignee
Siemens and Halske AG
Siemens AG
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 Siemens and Halske AG, Siemens AG filed Critical Siemens and Halske AG
Publication of GB317560A publication Critical patent/GB317560A/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
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/50—Customised settings for obtaining desired overall acoustical characteristics
    • H04R25/502—Customised settings for obtaining desired overall acoustical characteristics using analog signal processing

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)

Abstract

317,560. Jackson, L. Mellersh-, (Siemens & Halske Akt.-Ges.). May 31, 1928. Attenuating equalizers and similar impedance networks; amplifying systems. - An electric instrument for diagnosing or correcting defective hearing includes a device which decreases the intensity of the audible sounds from a chosen limit frequency in a progressively increasing measure towards low frequencies. The device may comprise a sound-receiving instrument m, which is preferably more sensitive to sounds of higher audible frequency connected to an aperiodic filter S, the circuit of which is shown in Fig. 2. The varying potentials from the filter S are led into an amplifying device v which feeds a telephone t preferably made especially sensitive to the sounds of higher audible frequency and well damped. The filter may contain inductances as well as resistances and capacities, and may be combined with the amplifier.
GB15933/28A 1927-04-12 1928-05-31 Apparatus for diagnosing and correcting defective hearing Expired GB317560A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1750960X 1927-04-12

Publications (1)

Publication Number Publication Date
GB317560A true GB317560A (en) 1929-08-22

Family

ID=7741769

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15933/28A Expired GB317560A (en) 1927-04-12 1928-05-31 Apparatus for diagnosing and correcting defective hearing

Country Status (2)

Country Link
US (1) US1750960A (en)
GB (1) GB317560A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2481900A (en) * 1941-08-14 1949-09-13 Hartford Nat Bank & Trust Co Audiometer
US2481973A (en) * 1941-08-14 1949-09-13 Hartford Nat Bank & Trust Co Audiometer
US4139730A (en) * 1977-08-10 1979-02-13 Barbara Franklin Method of testing human auditory responses

Also Published As

Publication number Publication date
US1750960A (en) 1930-03-18

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