DE144581C - - Google Patents
Info
- Publication number
- DE144581C DE144581C DENDAT144581D DE144581DA DE144581C DE 144581 C DE144581 C DE 144581C DE NDAT144581 D DENDAT144581 D DE NDAT144581D DE 144581D A DE144581D A DE 144581DA DE 144581 C DE144581 C DE 144581C
- Authority
- DE
- Germany
- Prior art keywords
- speaking
- mouth
- cone
- speaker
- 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.)
- Active
Links
- 239000003351 stiffener Substances 0.000 claims 1
- 206010048865 Hypoacusis Diseases 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F11/00—Methods or devices for treatment of the ears or hearing sense; Non-electric hearing aids; Methods or devices for enabling ear patients to achieve auditory perception through physiological senses other than hearing sense; Protective devices for the ears, carried on the body or in the hand
- A61F11/30—Non-electric hearing aids, e.g. ear trumpets, sound amplifiers or ear-shells
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biomedical Technology (AREA)
- Acoustics & Sound (AREA)
- Biophysics (AREA)
- Otolaryngology (AREA)
- Psychology (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Orthopedics, Nursing, And Contraception (AREA)
Publications (1)
Publication Number | Publication Date |
---|---|
DE144581C true DE144581C (enrdf_load_stackoverflow) |
Family
ID=411985
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT144581D Active DE144581C (enrdf_load_stackoverflow) |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE144581C (enrdf_load_stackoverflow) |
-
0
- DE DENDAT144581D patent/DE144581C/de active Active
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