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
  • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein

Definitions

• the invention relates to a loudspeaker box with housing walls forming a hollow body and at least one sound-emitting wall area for acoustically lifelike reproduction, in particular for the low-frequency area, with one or more electro-acoustic transducers, preferably electrodynamic speakers, which are arranged in the housing in the sound-emitting wall area , according to the preamble of claim 1.
• the sound transducer also called the chassis.
• the lifelike music playback depends on the correct frequency response.
• a sound transducer that reproduces the entire frequency spectrum would be an advantage, but is difficult to implement in practice.
• several sound transducers are used, usually 2, 3 or 4.
• the combinations with 2 sound transducers are referred to in the specialist literature as 2-way combinations and those with 3 accordingly as 3-way combinations.
• the so-called subwoofers have been emphasizing and
• Amplification of the bass reproduction through which consist of a deep bass loudspeaker enclosed and built into the body.
• a 3-way speaker box has the low, medium and high-frequency chassis.
• the chassis receives the electrical signals from an amplifier.
• the supply of the loudspeaker coil with alternating voltage causes the coil, which is fixed in a permanent magnet between the north and south poles, to become an electromagnet that starts to vibrate in accordance with the electrical pulses.
• the vibrations of the coil which in turn is connected to the loudspeaker diaphragm, are responsible for the oscillating movement of the diaphragm, which ultimately produces the sounds.
• the chassis are arranged in a housing which is made in particular from hard MDF boards.
• parameters such as efficiency and distortion factor play an important role.
• the aim is usually that the music playback takes place with a high degree of efficiency and low distortion. The acoustic reproduction becomes clear
• a closed loudspeaker box is of relatively simple construction and represents an airtight box, the task of which is to prevent the backward emitted wavefront of the sound transducer and the one emitted from the diaphragm front from colliding.
• a reflex box uses the rear sound of a sound transducer. This is achieved by installing one or two pipes on one side of the housing.
• a correctly designed reflex tube that is coordinated with the construction of the housing brings some advantages, which are reflected in emphasized bass reproduction and greater efficiency.
• the Baxreflex version has less braking effect, even none. This can also be noticed negatively if the bass speaker receives a powerful impulse. In this case, the coil can touch the magnetic surface, which could result in poor sound quality and damage to the loudspeaker. Further problems are the annoying vibrations of the box, which have a very negative influence on the sound reproduction, the waves standing in the housing as well as the flow losses in the air tube, which in turn increases
• the object of the invention is therefore to provide a loudspeaker box with a significantly higher degree of efficiency and natural sound reproduction, particularly in the deep bass range, in which no disturbing resonances and standing sound waves, which are responsible for a significant deterioration in the lifelike music reproduction and even for falsification, can occur ,
• this object is achieved in a loudspeaker box according to the preamble of claim 1 by the features specified in the characterizing part of claim 1, namely in that the housing of the speaker box has at least two check valves, one of which as an outlet opening when the pressure is increased and the other as an inlet opening Pressure reduction in the hollow body opens.
• This completely new design of a loudspeaker box means that the work of the valves during the signal reproduction fulfills such optimal physical conditions in which no undesirable cabinet resonances and humming noises occur.
• the efficiency of the speaker can be significantly improved (up to 6-10 dB) and outstanding sound quality can be achieved.
• Inlet openings 14 and fluid outlet openings 15 are provided, which are combined with solenoid valves 20, 21. These openings / valves are part of a system for modulated fluid application.
• the invention is based on a (known) electrodynamic speaker system, that is, from an electro-acoustic transducer and not from a pneumatic-acoustic transducer according to (2), so that the invention differs generically from the aforementioned speaker.
• an optimal pressure which is slightly more than atmospheric pressure.
• Such a construction combines the advantages of both a closed and a bass reflex box, which in turn is reflected in much better and low-loss sound reproduction.
• the further advantages that can be achieved with the invention consist in particular in that, through the work of the valves, which is tuned in accordance with the pressure pulses emanating from the loudspeaker membrane, a favorable pressure level for the optimal, gentle and less distortion-free functioning of the chassis can be achieved.
• the single figure shows a simplified schematic representation of a loudspeaker box 1, which consists of a housing 2, which is made of wood, for example.
• the loudspeaker box 1 according to the figure is provided for sound reproduction and for this purpose comprises a housing 2 with a front wall 2a, rear wall 2b and top and bottom walls 2c, 2d. The two side walls are not shown for simplicity.
• One or more loudspeakers are built into the housing 2.
• the loudspeaker box comprises a bass loudspeaker 3 and a tweeter loudspeaker 4, which are spatially separated from one another by a housing partition 8, so that two housing chambers 2.1 (bass region) and 2.2 (tweeter region) are formed.
• the loudspeaker box 1 is thus designed as a 2-way loudspeaker box.
• the loudspeaker box 1 can also comprise only one or more, in particular 3, loudspeakers.
• the chassis 3 and 4 are arranged, for example, in the front plate 2a of the housing 2.
• the bass speaker is designed for approx. 20 - 5000 Hz and the tweeter for approx. 2000 - 20000 Hz.
• the membrane of the “woofer” 3 moves in the direction of the front wall 2a or rear wall 2b.
• REISSlG-03Csx Front wall 2a causes the air expansion, which is responsible for lowering the air pressure.
• the lower pressure acts on the control unit 6a of the check valve 5a, which - as the air flow arrow f2 illustrates - serves as a pressure-dependent inlet valve and thus allows an amount of air to flow into the bass region 2.1. The air pressure is thus increased.
• the loudspeaker box 1 has in its rear wall 2b the two openings (9a, 9b) for inserting the check valve arrangements 7a, 5a; 7b, 5b. More than two openings and check valve arrangements can also be provided.
• the openings 9a, 9b are arranged in one of the outer walls 2a, 2b, in the example in the outer wall 2b. Specifically, a pipe section 7a, 7b is inserted in each of the openings 9a, 9b, and in the interior of the pipe sections 7a, 7b a check valve 5a, 5b is connected to these in terms of flow technology.
• the loudspeaker box can advantageously be designed as a subwoofer box.
• a passage cross-section (Q) has in the range of
• check valves (5a, 5b) can also be controllable in their passage cross section depending on a sound pressure-analogous variable.
• tweeters 8 housing partition 2.1, 2.2 housing chambers 5a, 5b check valves

Landscapes

• Physics & Mathematics (AREA)
• Engineering & Computer Science (AREA)
• Acoustics & Sound (AREA)
• Signal Processing (AREA)
• Details Of Audible-Bandwidth Transducers (AREA)
• Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
• Packages (AREA)
• Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
• Telephone Function (AREA)
• Chair Legs, Seat Parts, And Backrests (AREA)
• Liquid Crystal (AREA)
• Surgical Instruments (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=32945833

Family Applications (1)

Country Status (6)

Cited By (1)

Families Citing this family (1)

Citations (3)

Family Cites Families (1)

• 2003
  • 2003-03-05 DE DE10309517A patent/DE10309517B4/de not_active Expired - Fee Related
• 2004
  • 2004-03-03 DE DE502004009718T patent/DE502004009718D1/de not_active Expired - Fee Related
  • 2004-03-03 EP EP04716575A patent/EP1600034B1/de not_active Expired - Lifetime
  • 2004-03-03 AT AT04716575T patent/ATE436156T1/de not_active IP Right Cessation
  • 2004-03-03 ES ES04716575T patent/ES2328692T3/es not_active Expired - Lifetime
  • 2004-03-03 DK DK04716575T patent/DK1600034T3/da active
  • 2004-03-03 WO PCT/EP2004/002117 patent/WO2004080115A1/de active Application Filing

Patent Citations (3)

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