AT515579A1 - sound system - Google Patents

Abstract

A public address system, in particular for passenger rail vehicles, comprising at least one control device (3) and a plurality of parametric loudspeakers (4) controlled by the control device (3), wherein the parametric loudspeakers (4) are interconnected to at least two sounding areas (A, B) and into which at least two sounding areas (A, B) each different audio signals are reproduced.

Description

Confession

Sound system.

Technical area

The invention relates to a public address system, in particular for passenger rail vehicles.

State of the art

For the information of passengers, in particular rail passengers while driving public address systems are common.

In this case, a plurality of loudspeakers are usually arranged in the passenger compartment via which information can be radiated. The most important information is, for example, the next approaching stop, connections, delays and special operating instructions such as information about the position of the platform or changed route guidance in a station.

However, this information is not for all passengers of a train of equivalent interest. Typically, passengers of suburban services, such as subways, already preparing to leave the vehicle at exit level, are interested in other information than those still available for other routes in that area Vehicle will remain. If any kind of potentially required information is emitted acoustically in a vehicle, it is unacceptable to the passengers and this information is perceived as a nuisance. Due to the open design, there is no spatial separation or acoustic separation of descending

Passengers are possible, so that the reproduction of specific information in certain areas of the vehicle (for example, immediately before the exits) is not possible, since this information is quieter but clearly and understandably audible in the rest of the vehicle.

Presentation of the invention

The invention is therefore based on the object to provide a sound system, by means of which in different areas of a passenger vehicle each different soundings can be performed, these soundings are practically inaudible in adjacent areas.

The object is achieved by a sound system having the features of claim 1. Advantageous embodiments are the subject of the subordinate claims.

According to the basic idea of the invention, a sound system is constructed which comprises at least one control device and a plurality of parametric loudspeakers controlled by the control device, wherein the parametric loudspeakers are interconnected to at least two sounding areas and different audio signals are reproducible in the at least two sounding areas.

As a result, the advantage can be achieved to be able to reproduce different audio signals in spatially separated locations, but no acoustic separation of these locations (areas of sound) is required. The use according to the invention of parametric loudspeakers thereby concentrates the sound to the desired sound range, so that outside of this

Sonic range of the acoustic level of a reproduced signal is barely audible.

Particularly advantageous is the use of an inventive sound system in means of transport, in particular in rail vehicles. This makes it possible

Residential areas of passengers and entry / exit areas differently to sound and thus the passengers each different information to submit.

The public address system is to be equipped with at least one controller comprising the corresponding circuits for driving parametric loudspeakers. These electrical circuits include power amplifiers and means for controlling the focusing of the sound to be delivered by the parametric loudspeakers. The controllers may be implemented as separate assemblies or as part of a speaker assembly. The

Control devices include signal inputs for supplying audio signals, wherein it is particularly advantageous to provide a plurality of signal inputs for different signal sources. Furthermore, it is advantageous to supply at least one signal source by means of a digital bus system, since in this way a particularly simple integration of a sound system into modern vehicle electronics is made possible.

The parametric loudspeakers are preferably designed as loudspeaker modules and can be connected to the loudspeakers in

Passenger vehicles in common installation locations (covering the ceiling, so-called Dachvouten, door pillars, etc.) are arranged. The spatial-spatial radiation characteristic inherent in the parametric loudspeakers allows for the elimination of acoustic shielding components between the acoustic regions.

The information in which sounding area a particular audio signal is to be broadcast can be transmitted to the control device via various mechanisms. For example, each signal input to the controller may be assigned a particular range of sound, thereby reproducing an audio signal applied there in this predetermined range of sound. Higher flexibility of reproduction is achievable by superimposing on the audio signal information defining the sounding range. This is particularly advantageous in a digital signal feed, since this function is particularly easy to realize.

A preferred embodiment of the invention provides to connect a memory device to the control devices in which frequently used audio signals (e.g., station announcements) are stored. These

Memory means may on the one hand be prepared with the required audio signal or be descriptively executed so that during operation of the sound system the required audio signals may be deposited on the memory means.

The latter embodiment is particularly advantageous if the public address system is equipped with a wireless data transmission device, since by

Modification of the control device can be very easily a transfer of the detected by the wireless data transmission device and transmitted to the control device audio signals to the storage device. Thus, the prescaler is achievable to be able to perform the standard announcements such as station names without manual intervention such as exchanging storage media.

Brief description of the drawings

They show by way of example:

Fig.l rail vehicle with PA areas.

Fig.2 sound system.

3 control device with signal sources.

Embodiment of the invention

Fig.l shows by way of example and schematically a rail vehicle with sounding areas. The plan view of a rail vehicle 1 is shown, which has a central arranged access area, in which doors 2 are arranged on both sides. The rail vehicle 1 is divided into three sounding areas. In this case, there are provided two passenger occupancy areas associated with the PA area A and another PA area B associated with the board area. In the sounding areas A, B, different audio signals are reproduced which are as far as possible inaudible in the adjacent sounding area.

Fig. 2 shows by way of example and schematically a sound system. A block diagram of a sound system comprising a controller 3 and three parametric loudspeakers 4 is shown. Two parametric loudspeakers 4 are assigned to the sound area A, a parametric loudspeaker 4 is assigned to the sound area B. The control device 3 is equipped with signal inputs 5, 6, via which the audio signals to be reproduced can be fed to the control device. Other components, such as a power supply are not shown in Fig.2.

3 shows, by way of example and schematically, a control device with signal sources. A control system 3 of a public address system is shown, which comprises three signal inputs 5, 6, 7. At the signal input 5 is a wireless

Data transmission device 8 connected, which is formed for the data connection with one or more remote station and via which audio signals are transmitted to the control device 3. By way of this wireless data transmission device 8, situation-specific information can be transmitted to the passengers without requiring the assistance of the driving personnel. Connected to the signal input 6 is a microphone 9, via which the announcements of the driving personnel to the passengers are receivable. To the signal input 7, a memory device 10 is connected, in which the audio signals of the

Standard information, such as the station announcements are stored. According to one embodiment of the invention, the control device 3 comprises means for the memory device 10 of the wireless

Data transmission device 8 to describe transmitted audio signals, for example, to equip a railcar with the station announcements another line.

List of terms 1 Passenger rail vehicle 2 Door 3 Control device 4 Parametric loudspeaker 5 Signal input 1 6 Signal input 2 7 Signal input 3 8 Wireless data transmission device 9 Microphone 10 Storage device

A PA area A

B PA area B

Claims (8)

Claims 1. A loudspeaker system comprising at least one control device (3) and a plurality of parametric loudspeakers (4) controlled by the control device (3), characterized in that the parametric loudspeakers (4) are interconnected to at least two sounding areas (A, B) and at least two Sounding areas (A, B) each different audio signals are reproducible. 2. A sound system according to claim 1, characterized in that the control device (3) signal inputs (5, 6, 7), via which at least one audio signal to be reproduced is fed ,bebenbenben the audio signal in addition to information on those areas of sound (A, B) is transmitted, in which the respective audio signal should be reproduced. 3. PA system according to one of claims 1 or 2, characterized in that a memory device (10) is provided, which of the control device (3) is writable and readable and in whichAudio signals for playback via the parametric speakers (4) can be stored. 4. PA system according to one of claims 1 or 2, characterized in that at a signal input (6) of a microphone (9) recorded audio signal is fed, said audio signal in all areas of sound (A, B) is reproduced. Sound reinforcement system according to one of claims 1 or 2, characterized in that a wireless data transmission device (8) is connected to the control device (3) by means of which audio signals to be replayed can be transmitted to the control device (3). 6. PA system according to one of claims 1 to 5, characterized in that the sound system for mounting in a passenger rail vehicle (1) is formed. A sound reinforcement system according to claim 6, characterized in that a sounding area (A) is arranged in the occupied areas of a passenger rail vehicle (1) and a further sounding area (B) is arranged in the boarding areas of a passenger rail vehicle (1). Passenger rail vehicle (1), characterized in that the passenger rail vehicle (1) is equipped with a sound system according to one of Claims 1 to 7.