BE420682A - - Google Patents
Info
- Publication number
- BE420682A BE420682A BE420682DA BE420682A BE 420682 A BE420682 A BE 420682A BE 420682D A BE420682D A BE 420682DA BE 420682 A BE420682 A BE 420682A
- Authority
- BE
- Belgium
- Prior art keywords
- hearing
- mask
- microphone
- transmitting
- sounds
- Prior art date
Links
- 210000005069 ears Anatomy 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 7
- 230000001681 protective effect Effects 0.000 claims description 6
- 239000002775 capsule Substances 0.000 claims description 5
- 238000009423 ventilation Methods 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000005474 detonation Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims description 3
- 230000003321 amplification Effects 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 5
- 238000009434 installation Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 241000207836 Olea <angiosperm> Species 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 210000000613 ear canal Anatomy 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000002341 toxic gas Substances 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)
- Respiratory Apparatuses And Protective Means (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE420682A true BE420682A (enrdf_load_html_response) |
Family
ID=82704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE420682D BE420682A (enrdf_load_html_response) |
Country Status (1)
| Country | Link |
|---|---|
| BE (1) | BE420682A (enrdf_load_html_response) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2305898A1 (fr) * | 1975-03-24 | 1976-10-22 | Larkin Wallace | Casque de communication acoustique |
-
0
- BE BE420682D patent/BE420682A/fr unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2305898A1 (fr) * | 1975-03-24 | 1976-10-22 | Larkin Wallace | Casque de communication acoustique |
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