DE133386C - - Google Patents
Info
- Publication number
- DE133386C DE133386C DENDAT133386D DE133386DA DE133386C DE 133386 C DE133386 C DE 133386C DE NDAT133386 D DENDAT133386 D DE NDAT133386D DE 133386D A DE133386D A DE 133386DA DE 133386 C DE133386 C DE 133386C
- Authority
- DE
- Germany
- Prior art keywords
- sound
- grooves
- cover
- sound cover
- wall
- 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
- 239000012528 membrane Substances 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 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
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/08—Mouthpieces; Microphones; Attachments therefor
- H04R1/083—Special constructions of mouthpieces
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE133386C true DE133386C (enrdf_load_stackoverflow) |
Family
ID=401590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT133386D Active DE133386C (enrdf_load_stackoverflow) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE133386C (enrdf_load_stackoverflow) |
-
0
- DE DENDAT133386D patent/DE133386C/de active Active
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