GB317560A - Apparatus for diagnosing and correcting defective hearing - Google Patents
Apparatus for diagnosing and correcting defective hearingInfo
- 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
Links
- 230000002950 deficient Effects 0.000 title abstract 2
- 230000007423 decrease Effects 0.000 abstract 1
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.
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)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2481973A (en) * | 1941-08-14 | 1949-09-13 | Hartford Nat Bank & Trust Co | Audiometer |
| US2481900A (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 |
-
1928
- 1928-05-31 GB GB15933/28A patent/GB317560A/en not_active Expired
- 1928-07-31 US US296557A patent/US1750960A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US1750960A (en) | 1930-03-18 |
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