GB391672A - Improvements in mouthpieces, horns or similar devices for emitting sound - Google Patents
Improvements in mouthpieces, horns or similar devices for emitting soundInfo
- Publication number
- GB391672A GB391672A GB25811/32A GB2581132A GB391672A GB 391672 A GB391672 A GB 391672A GB 25811/32 A GB25811/32 A GB 25811/32A GB 2581132 A GB2581132 A GB 2581132A GB 391672 A GB391672 A GB 391672A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sound
- wave
- horns
- horn
- stated
- 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
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09D—RAILWAY OR LIKE TIME OR FARE TABLES; PERPETUAL CALENDARS
- G09D1/00—Railway or like time or fare tables; Indicating or reading aids therefor
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/18—Methods or devices for transmitting, conducting or directing sound
- G10K11/26—Sound-focusing or directing, e.g. scanning
- G10K11/28—Sound-focusing or directing, e.g. scanning using reflection, e.g. parabolic reflectors
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
Abstract
391,672. Sound-directing appliances. PINTSCH AKT.-GES., J., 71, Andreasstrasse, Berlin. Sept. 16, 1932, No. 25811. Convention date, Oct. 27, 1931. [Classes 13 and 118 (ii).] In order that a directional sound field may be generated or received the opening of a mouthpiece, horn or similar emitter or receiver is formed so that each of its' axes is a whole multiple of the half length of the sound wave to be emitted or received. Fig. 1 shows the opening of a horn &c. in which the major axis a-x is equal to three half-wave, lengths the minor axis b-z being stated to be two half-wave lengths. It is stated that propagation of sound waves from imaginary sound generators at 1, 2, 3 would reinforce one another and contract the sound field into one horizontal plane. Figs. 2 and 2a show a generator having four horns each propagating sound waves 5 the overlapping of which give an intensified effect in the horizontal plane and the sound field being, indicated by the full line 6.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE391672X | 1908-02-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB391672A true GB391672A (en) | 1933-05-04 |
Family
ID=6381206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB25811/32A Expired GB391672A (en) | 1931-10-27 | 1932-09-16 | Improvements in mouthpieces, horns or similar devices for emitting sound |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR391672A (en) |
| GB (1) | GB391672A (en) |
-
1908
- 1908-06-04 FR FR391672D patent/FR391672A/en not_active Expired
-
1932
- 1932-09-16 GB GB25811/32A patent/GB391672A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR391672A (en) | 1908-11-06 |
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