FI874907A - Menetelmä ja laite ulkoa tärykalvoon tulevan kohinan vaimentamiseksi - Google Patents
Menetelmä ja laite ulkoa tärykalvoon tulevan kohinan vaimentamiseksi Download PDFInfo
- Publication number
- FI874907A FI874907A FI874907A FI874907A FI874907A FI 874907 A FI874907 A FI 874907A FI 874907 A FI874907 A FI 874907A FI 874907 A FI874907 A FI 874907A FI 874907 A FI874907 A FI 874907A
- Authority
- FI
- Finland
- Prior art keywords
- sound
- external noise
- suppresser
- loudspeaker
- cavity
- Prior art date
Links
Landscapes
- Helmets And Other Head Coverings (AREA)
- Telephone Set Structure (AREA)
- Electrophonic Musical Instruments (AREA)
- Toys (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Circuit For Audible Band Transducer (AREA)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8603394 | 1986-03-07 | ||
FR8603394A FR2595498B1 (fr) | 1986-03-07 | 1986-03-07 | Procedes et dispositifs pour attenuer les bruits d'origine externe parvenant au tympan et ameliorer l'intelligibilite des communications electro-acoustiques |
FR8700056 | 1987-01-06 | ||
PCT/FR1987/000056 WO1987005430A1 (fr) | 1986-03-07 | 1987-03-06 | Procedes et dispositifs pour ameliorer l'intelligibilite des communications electro-acoustiques |
Publications (4)
Publication Number | Publication Date |
---|---|
FI874907A0 FI874907A0 (fi) | 1987-11-05 |
FI874907A true FI874907A (fi) | 1987-11-05 |
FI96069B FI96069B (fi) | 1996-01-15 |
FI96069C FI96069C (fi) | 1996-04-25 |
Family
ID=26225074
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI874907A FI96069C (fi) | 1986-03-07 | 1987-11-05 | Menetelmä ja laite ulkoa tärykalvoon tulevan kohinan vaimentamiseksi |
Country Status (2)
Country | Link |
---|---|
FI (1) | FI96069C (fi) |
NO (1) | NO171657C (fi) |
-
1987
- 1987-11-05 FI FI874907A patent/FI96069C/fi not_active IP Right Cessation
- 1987-11-05 NO NO874618A patent/NO171657C/no unknown
Also Published As
Publication number | Publication date |
---|---|
FI96069C (fi) | 1996-04-25 |
NO874618D0 (no) | 1987-11-05 |
FI96069B (fi) | 1996-01-15 |
NO171657B (no) | 1993-01-04 |
FI874907A0 (fi) | 1987-11-05 |
NO171657C (no) | 1993-04-14 |
NO874618L (no) | 1987-11-05 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
BB | Publication of examined application | ||
FG | Patent granted |
Owner name: CENTRE NATIONAL DE LA RECHERCHE |
|
MA | Patent expired |