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BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a
speaker for delivering sound waves to a cabin and an air duct for air conditioning of the cabin,
the air duct having an air duct opening facing the cabin. It relates to moving means.
BACKGROUND OF THE INVENTION This type of transport means or vehicle is known, for
example, as a ship, an aircraft, but in particular as a motor vehicle. In this case, a loudspeaker is
provided, which is used as a component of an audio device for transmitting sound to the
passenger space or to the passenger compartment. At that time, the cabin may be substantially
sealed to the outside, or may be opened as in, for example, a cabriolet. Furthermore, in the case
of this type of transport, air ducts are usually provided for air conditioning, ie for ventilation and
/ or heating and / or cooling of the cabin. Such air ducts have an air duct opening, in particular in
the cockpit area of the vehicle, through which air can be led to the passenger compartment and /
or exhaust air from the passenger compartment to the air duct. Can.
A disadvantage of the known moving means is that the built-in space for the loudspeaker is very
limited. In particular, in the cockpit area, a large amount of installation space is required, such as
display devices, air conditioner operating devices, storage boxes, air ducts and air duct openings,
so that very little installation space is available for the loudspeaker. Therefore, it is possible to
incorporate only small and unsounding speakers into the cockpit, or no speakers at all. In some
cases, a speaker is incorporated into the door of the vehicle, where it can take advantage of some
of the built-in space. However, the incorporation of the speaker in the door causes other
drawbacks such as acoustic problems, and the need for a special seal against moisture.
DE 196 54 416 C1 discloses a blind for a vehicle interior space with a grid-like surface provided
with a penetration in at least one partial region. The blind can then be integrated into the inner
space covering member or the instrument panel, in which case the partial area with the
penetration covers the opening of the air conduit extending into or behind the inner space
covering member or the instrument panel. There is. Furthermore, in the blind, at least one further
partial area of the grid surface is provided with a penetration covering a loudspeaker arranged in
the gap of the inner space covering or the instrument panel. While this does certainly save space
and combine the various devices, such blinds also do not extend the built-in space available for
the speaker.
[Patent Document 1] German Federal Patent Publication No. 196 54 416
SUMMARY OF THE INVENTION It is therefore an object of the present invention to avoid the
need to provide extra intrinsic built-in space for the loudspeakers, for example in moving vehicles
of the type mentioned at the beginning with loudspeakers in the cockpit area. It is to configure.
SUMMARY OF THE INVENTION According to the invention this problem is solved by the fact that
the loudspeaker is arranged in an air duct and sound waves are delivered to the passenger
compartment through the air duct opening.
According to such a configuration, the speaker is disposed in a moving means which can not be
used otherwise, for example, in a dead space of a vehicle.
In this case, the characteristics of the spatial radiation of the sound waves from the loudspeakers
are exploited, whereby the sound waves are guided in the air duct and guided and delivered to
the cabin.
Yet another advantage is that air can flow around the speakers in the air duct to prevent
overheating of the speakers.
Furthermore, the weight of the moving means, eg the vehicle, will also be reduced. The reason is
that a complicated holding frame and a cover frame for the speaker become unnecessary.
Moreover, it is not necessary to mount an additional cover grid which is placed in front of it to
protect the loudspeaker from mechanical damage as in the prior art. Furthermore,
advantageously, the loudspeakers directly exposed to the surrounding environment in the cabin,
such as, for example, the Cabriolet, are specially protected by incorporation in the air duct.
Utilizing the volume of the air duct as a resonant space for the loudspeaker advantageously
provides good acoustic characteristics of the sound reproduction.
Any speaker can be used as the speaker, for example a broadband speaker can be used which
substantially reproduces the entire frequency spectrum heard by humans. However, according to
an advantageous embodiment of the invention, the loudspeaker is a bass loudspeaker, which
makes it possible to utilize the available resonant space in the air duct particularly effectively, in
particular to achieve high sound quality.
If, for example, a bass loudspeaker is used, according to another embodiment of the present
invention, it is very advantageous to arrange the air duct opening in the immediate space of the
passenger compartment. Low frequencies can not locate the human hearing. Therefore, the
speaker which sends out such a frequency can be arranged at any position. In addition, the
placement of the corresponding air duct opening in the foot space makes it possible to
incorporate a specially protected loudspeaker and to realize the use of a substantially unusable
installation area for further equipment. .
According to another advantageous embodiment of the invention, the loudspeaker is additionally
arranged in the air duct so that sound waves can be delivered directly into the cabin. In this way,
sound reproduction with extremely high sound quality is achieved. In particular, if a bass
loudspeaker is used, this can achieve an improvement in sound by creating an acoustical short in
the cabin that is not problematic at low frequencies. For example, a loudspeaker can be arranged
on the inner wall of the air duct in the penetration area in the cabin.
The acoustic quality of the loudspeaker is directly influenced by the resonance characteristics
that occur in the air duct volume. In particular, if the air duct is to be optionally shaped, it is
advantageous to arrange in the air duct a volume element for the acoustic adjustment of the
loudspeaker. This volume member is preferably glued to the inner wall of the air duct, for
example a plastic hollow body or a foam plastic member, which is acoustically suitable depending
on the individual transport means or the type of vehicle and / or the individual shape of the air
duct. Can be arranged to be
Basically, the air duct can be arranged at any point in the moving vehicle cabin, but according to
an advantageous embodiment of the invention the air duct is arranged in the cockpit member
together with the air duct opening and the loudspeaker, whereby the air duct In particular, a
large volume can be used as a resonant space. The cockpit can be, for example, an instrument
panel, in particular an instrument panel cover.
Also, if the air duct is combined with the cockpit to form a single piece, and the number of parts
is very small, then the assembly of the moving means, such as a vehicle, becomes even easier.
Furthermore, if the air duct is a plastic blow molded part, the manufacture of the air duct and
thus also the production of the displacement means is very low cost and easy.
This makes it possible to integrate the air duct into other built-in components of the cabin, for
example the cockpit, in a particularly simple manner.
The invention will now be described in detail on the basis of examples with reference to the
DESCRIPTION OF THE PREFERRED EMBODIMENT In the drawings, corresponding parts are
provided with the same reference numerals.
FIG. 1 shows a passenger compartment space with a foot space 17 or a cabin 2 and a windshield
3 in a stylized partial view of a motor vehicle 1.
A cockpit element, for example, is arranged in the cabin 2 and is constituted by an instrument
panel 4 which is only partially shown here.
The instrument panel 4 has an instrument panel cover 5. The instrument panel cover 5 is an
elongated member which extends generally transversely of the vehicle 1 and has an air duct 7 in
communication with the air duct opening 6. The air duct opening 6 points towards the passenger
compartment, so that air can be passed from the air duct 7 to the passenger compartment 2 via
this (as suggested by the arrow 8).
Furthermore, in the air duct 7 formed as a plastic blow molding member, a speaker 9 for
transmitting the sound wave or the acoustic wave indicated by the arrow 10 is disposed. The
sound wave emitted from the speaker 9 enters the passenger compartment by the air duct
opening 6 as indicated by the arrow 11. Thus, the vehicle occupant 12 can perceive the sound
waves (10, 11) sent from the speaker 9.
In the air duct 7, there is disposed a volume member 13 which acts on the resonance of the air
duct 7 to adjust the sound of the speaker.
FIG. 2 shows the cockpit member configured as the instrument panel 4 in the same manner as
FIG. 1 in an enlarged manner, and this is drawn as a perspective view seen substantially in the
vehicle longitudinal axis direction L (see FIG. 1) There is.
The air duct 7 extends over substantially the entire width of the instrument panel 4 (i.e.,
substantially the entire width of the cabin) and is substantially formed by the outer wall thereof.
The instrument panel cover 5 also belongs to this outer wall. A speaker 9 is disposed in the left
region 15 of the air duct 7 in the traveling direction F (see FIG. 1) at the inner wall 14 of the air
duct. The speaker 9 is bonded to the air duct inner wall 14.
Further, FIG. 3 shows an enlarged cross-sectional view of the instrument panel 4 viewed along
the line III-III of FIG. As shown therein, the instrument panel 4 has, for example, a housing 15
and a mounting rim 16 adjacent to the air duct 7. The loudspeaker 9 arranged on the inner wall
14 of the air duct delivers the sound wave indicated by the arrow 10 to the air duct 7. The sound
waves emitted from the loudspeaker 9 as indicated by the arrow 18 through the air duct opening
6 which is arranged here in the passenger foot space 17 (also see FIG. 1) not shown here. 10)
enters the room. In addition to this, the inner wall 14 of the air duct can have a notch in the
through region 19 corresponding to the speaker 9, and the sound wave indicated by the broken
arrow 20 transmitted from the speaker 9 through this can be used as it is in the foot space 17
Pass through. Thereby, the acoustics between the sound wave (arrow 18) entering the foot space
17 through the air duct opening 6 and the sound wave (dashed line 20) entering the foot space
17 directly through the notch in the penetration region 19 of the air duct inner wall 14 As a
short circuit occurs, this is not a problem, especially at low frequencies, so in this embodiment a
bass speaker is particularly suitable as the speaker.
Brief description of the drawings
1 is a partial view of a vehicle equipped with a speaker and an air duct.
2 is a perspective view of a cockpit provided with a speaker.
3 is a cross-sectional view of the cockpit according to FIG. 2 along line III-III.
Explanation of sign
REFERENCE SIGNS LIST 1 automobile 2 cabin 3 front glass 4 instrument panel 5 instrument
panel cover 6 air duct opening 7 air duct 9 speaker 12 vehicle occupant 13 volume member 17
leg space