DE739326C - Flat speakers with a baffle that is as close as possible to a building or room wall - Google Patents
Flat speakers with a baffle that is as close as possible to a building or room wallInfo
- Publication number
- DE739326C DE739326C DET47571D DET0047571D DE739326C DE 739326 C DE739326 C DE 739326C DE T47571 D DET47571 D DE T47571D DE T0047571 D DET0047571 D DE T0047571D DE 739326 C DE739326 C DE 739326C
- Authority
- DE
- Germany
- Prior art keywords
- baffle
- building
- room wall
- wall
- flat
- 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
- 229920000742 Cotton Polymers 0.000 claims description 3
- 239000011490 mineral wool Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims 2
- 241001108995 Messa Species 0.000 claims 1
- 239000000463 material Substances 0.000 description 6
- 238000013016 damping Methods 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 210000002268 wool Anatomy 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
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
- H04R1/2869—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself
- H04R1/2892—Mountings or supports for transducers
- H04R1/2896—Mountings or supports for transducers for loudspeaker transducers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
- H04R2201/02—Details casings, cabinets or mounting therein for transducers covered by H04R1/02 but not provided for in any of its subgroups
- H04R2201/021—Transducers or their casings adapted for mounting in or to a wall or ceiling
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Building Environments (AREA)
Description
Flachlautsprecher mit an einer Gebäude- oder Zimmerwand möglichst eng anliegender Schallwand Neuerdings sind Lautsprecher geringer Bautiefe (kleiner als 6 cm) bekanntgeworden, die insbesondere bei behelfsmäßigen Installationen in Hallen, Museen ,o. dgl. benutzt werden. Diese Lautsprecher heben sich kaum von den Wänden ab und `beeinträchtigen daher den ästhetischen Eindruck des Raumes, in dem .sie angeordnet sind, praktisch gar nicht, selbst wenn .solche Lautsprecher in größerer Zahl vorhänden sind.Flat speakers with on a building or room wall if possible close-fitting baffle Recently, loudspeakers with a smaller installation depth (smaller than 6 cm), which is particularly useful for makeshift installations in Halls, museums, etc. Like. Be used. These speakers hardly stand out from the crowd Walls and `therefore impair the aesthetic impression of the room in which .they are arranged, practically not at all, even if .such loudspeakers in larger Number are available.
Bei der Anbringung dieser Lautsprecher an den Wänden eines Raumes. haben sich jiedoch gewisse Nachteile infolge der reflektierenden Eigenschaften der Wände herausgestellt. Nähert man einen in eine Schallwand eingebauten Flachlautsprecher einer schallreflektierenden Wand (Mauer, Holzwand o. dgl. ), so - tritt eine Beeinflussung des Frequenzganges des Lautsprechers ein. Der Schalldruck eines frei aufgehängten, in eine Schallwand eingebauten Flachlautsprechers, der von 13o bis 8oo Hz annähernd konstant war, wurde bei Annäherung der Schallwand an die reflektierende Wand bis auf 2,5 cm Abstand unterhalb 40O Hz auf etwa dein vierten Teil. herabgesetzt. Über ¢0o Hzerhöhte sich der Schalldruck auf das Doppelte. Diese Herabsetzung der tiefen und Erhöhung der mittleren Lagen ist außerordentlich störend, .da das Ohr den Mangel an tiefen Tönen, der noch betont wird durch das Hervortreten edier mittleren Lagen, unangenehm empfindet.When installing these speakers on the walls of a room. However, certain disadvantages have been found due to the reflective properties of the walls. If a flat loudspeaker built into a baffle is approached to a sound-reflecting wall (wall, wooden wall or the like), the frequency response of the loudspeaker is influenced. The sound pressure of a freely suspended flat loudspeaker built into a baffle, which was almost constant from 130 to 8oo Hz, was about the fourth when the baffle approached the reflecting wall up to 2.5 cm below 40O Hz. degraded. Above ¢ 0o H, the sound pressure doubled. This lowering of the lower ranges and raising of the middle ranges is extremely disturbing, since the ear is uncomfortable with the lack of low tones, which is emphasized by the emergence of the middle ranges.
Es ist bereits bekannt, störende Eigen-.Schwingungen bei Lautsprechern dadurch zu dämpfen, daß man hinter die Membran Watteflocken .o. dgl. brachte, so daß eine Dämpfung zu großer Amplituden erzielt wurde. Ferner ist bekannt, in Räumen mit starkem Nachhall die Wände mit stark absorbierendem Werkstoff zu belegen, um dadurch die Nachhalleigenschaften des Raumes zu beeinflussen; bei Zimmerecklautspre,chern wird außerdem auch die Rückseite ,der Schallwand mit solchem Stoff belegt. Die Erfindung betrifft einen Flachlautsprecher mit an :einer Gebäude- oder Zimmerwand möglichst eng anliegender Schallwand und einer Bautiefe von etwa 6 cm und weniger, der dadurch ausgezeichnet ist, daß zwischen Schallwand und Gebäude- bzw. Zimmerwand schalldämpfende Stoffe, wie Schlakkenwolle, Watte o. d-1., vorgesehen sind.It is already known that disturbing natural vibrations in loudspeakers to dampen by placing cotton wool flakes behind the membrane .o. like. brought so that attenuation of amplitudes that were too large was achieved. It is also known in rooms to cover the walls with highly absorbent material with strong reverberation in order to thereby influencing the reverberation properties of the room; with room corner speakers The back of the baffle is also covered with such a material. the The invention relates to a flat loudspeaker with: a building or room wall A baffle that fits as closely as possible and a depth of about 6 cm and less, which is characterized by the fact that between the baffle and the building or room wall Sound-absorbing materials such as wool, wadding o. d-1., are provided.
Es kann auch die Schallwand kastenähnlich ausgebildet sein und der Zwischenraum zwischen Schallwand und reflektierender Wand durch einen Absorptionswerkstoff, wie Watte, Schlackenwolle o. dgl., ausgefüllt werden. Der Raum hinter der Membran selbst bleibt aber im Ge#gensatz zu den oben-erwähnten Membrandämpfungsanordnungen frei.The baffle can also be designed like a box and the Space between the baffle and the reflective wall through an absorption material, such as cotton wool, slag wool or the like., are filled. The space behind the membrane itself, however, remains in contrast to the above-mentioned membrane damping arrangements free.
Die Abbildung veranschaulicht ein Auisführungsbeispiel des Erfindungsgegenstandes. Der Flachlautsprecher i ist in eine Schallwand 2 .eingesetzt, die mittels der Abstützung 3 an der reflektierenden Wand 4 anliegt. Die Abstützung 3 kann aus einzelnen Stützen gebildet sein. Sie kann aber auch vollkommen geschlossen sein und die Schallwand gegen die reflektierende Wand so abstützen, daß ein kastenförmiges Gebilde entsteht. In den Raum 5 zwischen Schallwand 2 und reflektierende Wand 4. wird .der dämpfende Wcrkstoff (Watte, Schlackenwolle o. dgl.) gebracht. Wenn die abzustützenden Teile 3 als freie Stützen ausgebildet sind, muß das Dämpfungsmaterial durch Kleben oder durch Herumziehen eines Streifens aus starkem Papier, Textilstoffen, wie Gaze o. d71., vor dem Herausfallen gesichert werden.The figure illustrates an exemplary embodiment of the subject matter of the invention. The flat speaker i is inserted into a baffle 2, which by means of the support 3 rests against the reflective wall 4. The support 3 can consist of individual supports be educated. But it can also be completely closed and the baffle Support against the reflective wall in such a way that a box-shaped structure is created. In the space 5 between baffle 2 and reflective wall 4. the damping Material (wadding, slag wool or the like) brought. When the parts to be supported 3 are designed as free supports, the damping material must be glued or by pulling around a strip of strong paper, textile materials such as gauze or the like. d71., to be secured against falling out.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DET47571D DE739326C (en) | 1936-10-08 | 1936-10-08 | Flat speakers with a baffle that is as close as possible to a building or room wall |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DET47571D DE739326C (en) | 1936-10-08 | 1936-10-08 | Flat speakers with a baffle that is as close as possible to a building or room wall |
Publications (1)
Publication Number | Publication Date |
---|---|
DE739326C true DE739326C (en) | 1943-09-20 |
Family
ID=7562654
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DET47571D Expired DE739326C (en) | 1936-10-08 | 1936-10-08 | Flat speakers with a baffle that is as close as possible to a building or room wall |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE739326C (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE968492C (en) * | 1949-06-05 | 1958-02-27 | Siemens Ag | Loudspeaker group arrangement consisting of several loudspeakers built in a row in a common slat-like baffle |
DE968491C (en) * | 1949-06-05 | 1958-02-27 | Siemens Ag | Loudspeaker group arrangement consisting of several loudspeakers built in a row in a common slat-like baffle |
DE202015101134U1 (en) * | 2015-03-06 | 2016-06-08 | LEGIS GbR (vertretungsberechtigter Gesellschafter: Thomas C.O. Schmidt, 10707 Berlin) | Acoustic unit with fleece |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE568088C (en) * | 1929-04-17 | 1933-01-14 | Georg Seibt A G Dr | Funnelless large area loudspeaker |
-
1936
- 1936-10-08 DE DET47571D patent/DE739326C/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE568088C (en) * | 1929-04-17 | 1933-01-14 | Georg Seibt A G Dr | Funnelless large area loudspeaker |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE968492C (en) * | 1949-06-05 | 1958-02-27 | Siemens Ag | Loudspeaker group arrangement consisting of several loudspeakers built in a row in a common slat-like baffle |
DE968491C (en) * | 1949-06-05 | 1958-02-27 | Siemens Ag | Loudspeaker group arrangement consisting of several loudspeakers built in a row in a common slat-like baffle |
DE202015101134U1 (en) * | 2015-03-06 | 2016-06-08 | LEGIS GbR (vertretungsberechtigter Gesellschafter: Thomas C.O. Schmidt, 10707 Berlin) | Acoustic unit with fleece |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0811097B1 (en) | Plate resonator | |
WO2007033500A1 (en) | Furniture system for influencing the acoustics of a room | |
US2205804A (en) | Tone modifier device for electrical musical instruments | |
DE112018001396T5 (en) | Voice encryption system and / or related method | |
DE739326C (en) | Flat speakers with a baffle that is as close as possible to a building or room wall | |
DE624049C (en) | Flat speaker built into a housing | |
AT155765B (en) | Flat speaker built into a baffle. | |
DE102006033880B4 (en) | Sound absorber arrangement | |
DE202010010269U1 (en) | Absorber element with textile surface | |
EP2333181B1 (en) | Acoustical component for influencing sound in a room | |
US2335728A (en) | Sound absorbing or attenuant arrangement for reverberant rooms | |
CH199830A (en) | Loudspeaker built into a baffle. | |
DE4117694C2 (en) | Therapy device for the disabled | |
DE202020004930U1 (en) | Absorber unit, absorbing medium and higher frequencies and breaking the acoustic effect in the edges of rooms through shields, especially for small and medium-sized rooms | |
DE719191C (en) | Loudspeaker system for unmuffled or weakly dampened rooms | |
DE102020005619A1 (en) | Broadband compact absorber for soundproofing in communication rooms | |
DE102014107616B4 (en) | System and procedure for reducing speech intelligibility | |
Bonvallet | Field Sound Transmission Loss Tests of Movable Partitions for School Classrooms | |
DE925653C (en) | Housing for electrodynamic cone loudspeakers with a deeply tuned membrane | |
EP3123471B1 (en) | Equaliser, audio system with such an equaliser and method for equalising a sound mix | |
DE202022000228U1 (en) | Reflector-absorber unit with variable acoustic insulation, eliminating the room edge effect and supporting useful signals, especially for small to medium-sized rooms | |
Lane et al. | Acoustic Measurements in School Classrooms | |
DE581341C (en) | Loudspeaker arrangement for rooms with strong reverberation | |
Collins et al. | Definition Measurement Apparatus | |
Schroeder | On the Steady‐State Transmission in Rooms |