FR712451A - Improvements to speech delivery systems or the like - Google Patents
Improvements to speech delivery systems or the likeInfo
- Publication number
- FR712451A FR712451A FR712451DA FR712451A FR 712451 A FR712451 A FR 712451A FR 712451D A FR712451D A FR 712451DA FR 712451 A FR712451 A FR 712451A
- Authority
- FR
- France
- Prior art keywords
- delivery systems
- speech delivery
- speech
- systems
- delivery
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R5/00—Stereophonic arrangements
- H04R5/02—Spatial or constructional arrangements of loudspeakers
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US374120XA | 1930-03-04 | 1930-03-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR712451A true FR712451A (en) | 1931-10-02 |
Family
ID=21894197
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR712451D Expired FR712451A (en) | 1930-03-04 | 1931-03-03 | Improvements to speech delivery systems or the like |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR712451A (en) |
GB (1) | GB374120A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1100698B (en) * | 1956-11-07 | 1961-03-02 | Vakutronik Dresden Veb | Equipment with microphone, amplifier and loudspeaker to amplify the human voice |
-
1931
- 1931-03-03 FR FR712451D patent/FR712451A/en not_active Expired
- 1931-03-04 GB GB6760/31A patent/GB374120A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB374120A (en) | 1932-06-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DK46286C (en) | Device for sound attenuation in wires, in particular for aeration systems or the like. | |
FR709028A (en) | Improvements to adjustable seating systems | |
FR721123A (en) | Improvements to telephone systems | |
FR709175A (en) | Improvements to self-igniting cigarettes, cigars or the like | |
FR712451A (en) | Improvements to speech delivery systems or the like | |
FR704017A (en) | Improvements to telephone systems or similar transmission systems | |
FR783612A (en) | Improvements to television, telecinematography or the like systems | |
FR761604A (en) | Enhancements to dual-channel telephone systems and the like | |
FR684370A (en) | Improvements to telephone or similar systems | |
FR686977A (en) | Improvements to radiotelephone and similar systems | |
FR696097A (en) | Improvements to booths or the like | |
FR756382A (en) | Improvements to folding cars or the like | |
FR702038A (en) | Improvements to structures for vehicles, airplanes and the like | |
FR728626A (en) | Improvements to telephone systems | |
FR712321A (en) | Improvements to telephone systems | |
FR717671A (en) | Telephone systems | |
FR716364A (en) | Improvements to tightening tools, or the like | |
FR700159A (en) | Improvements to television systems and the like | |
FR726723A (en) | Improvements to control systems for t.s.f. and the like | |
FR707681A (en) | Improvements in telephone systems | |
FR752395A (en) | Improvements to telephone systems or other similar systems | |
CH145721A (en) | Drawing angle. | |
FR647751A (en) | Improvements to telephone systems | |
FR650954A (en) | Improvements to telephone systems | |
FR725229A (en) | Improvements to telephone systems |