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Tittel An auditory guidance method and system
Status
Hovedstatus
Detaljstatus
I kraft info Meddelt Patent meddelt (B1)
Patentnummer 348081
Søknadsnummer 20220217
Levert
Prioritet Ingen
Sakstype Nasjonal
Løpedag
Utløpsdato
Allment tilgjengelig
Meddelt info
Søker Norphonic AS (NO)
Innehaver Norphonic AS (NO)
Oppfinner Eugene Zaikonnikov (NO) .... se mer/flere nedenfor
Fullmektig ZACCO NORWAY AS (NO)
Patentfamilie Se i Espacenet

An auditory guidance system and method for use along a pathway (1) between an initial location (L) and a target location (4). A plurality of nodes (21-n) are arranged at intervals along the pathway and are activated in a sequence from the initial location and towards the target location. Each node comprises a directional sound generator (9a1-n) which is configured to emit a sound pulse (A) towards the initial location (L), in a sequence from the directional sound generator (9a1) in the first node (21) to the directional sound generator (9an) in the last node (2n), each sound pulse emission being interrupted by a time interval (Δt). The system and method may be used for evacuating individuals from a tunnel or other confined space.

Se forsidefigur og sammendrag i Espacenet


B1

Beskrivelse

An auditory guidance method and system

Technical field of the invention

The invention concerns an auditory guidance method and a system for executing such method, as set out by the preambles of claims 11 and 1 respectively.

Background of the invention

Public announcement (PA) systems for tunnels, corridors and other long and narrow rooms or passages, whether they are in buildings, below ground, on ships or part of any other type of structure, are fraught with problems related in particular to reverberation, echo, and interference between loudspeakers that are mounted at a distance from each other. These problems may become critical in emergencies where correct receipt and interpretation of information is essential in order to inform and guide people who are evacuating for example a tunnel. However, the problems are also relevant to situations that are not critical.

Currently, information helping people navigate in long corridors rely heavily on visual aids such as signs, arrows, and markings on the floor. Visual aid solutions are numerous, but they have the disadvantage of poor performance in low visibility and smoke. Audio is under-utilized. Auditory assistance systems do exist but are basic PA systems with only minor adaptations to the specific challenges associated with long tunnels and corridors.

The prior art includes US 20070279242 A1, which describes a plurality of directional sounders located in a region being monitored and that can be synchronously and sequentially activated in various patterns to establish an audibly defined exit route from the region. Emitted audio, from a respective sounder, can be different than the audio emitted by other activated sounders to provide a path and direction for evacuation to individuals in the vicinity of the exit route.

The prior art also includes EP 3629 604 A1, which discloses a sound system and associated devices and methods for delivering synchronized sound in long and narrow passageways such as tunnels and corridors. The system includes nodes installed at intervals in the passageway, each node having a microphone and two speakers, one pointing in each direction. Configuration of the system includes a first phase where the relative position of nodes to each other is determined by each node playing a test sound and the remaining nodes report the arrival time and/or sound level registered by its microphone, and a second phase where the distance between adjacent nodes is determined by one node playing a test sound and an adjacent node registering the delay caused by propagation of the sound between the two nodes. During use the system is configured to play in a manner synchronized based on the determined delays.

Summary of the invention

The invention is set forth and characterized in the main claim, while the dependent claims describe other characteristics of the invention.

It is thus provided an auditory guidance system for installation along a pathway between an initial location and a target location, comprising a plurality of nodes arranged at intervals along the pathway, wherein a first node is the closer node to the initial location and a last node is the closer node to the target location, characterized in that

- each node comprises one or more directional sound generator which is configured to emit a sound pulse towards the initial location, in a sequence from the directional sound generator in the first node to the directional sound generator in the last node, each sound pulse emission being interrupted by a constant time interval; and

- each node is configured to emit sound in a predetermined direction, and the sound generators within each node are pointing in opposite directions along the pathway.

In one embodiment, the directional sound generators are loudspeakers with small apertures arranged into an array. In one embodiment, each sound generator in each node is configured and controlled via a control system to emit a sound pulse with predefined characteristics. The said characteristics may comprise duration, pitch, volume. In one embodiment, said sound pulses comprises bell chimes or sound of footsteps on pavement. The system may be configured to emit the same sound pulse from all the nodes.

In one embodiment, the nodes are configured to be activated in a sequence, from the initial location and towards the target location. Sound generators in each node may be controlled to emit the same sound pulse at the same time, or to emit sound pulses in a desired sequence. In one embodiment, the sound pulse duration is constant.

The guidance system may be used as an evacuation system in a tunnel or other confined space, and the target location may be an emergency exit or another opening out of the tunnel or confined space.

It is also provided an auditory guidance method, for guiding at least one individual along a pathway from an initial location to a target location, characterized by emitting directional sound pulses from a plurality of nodes arranged at intervals along the pathway between the initial location and the target location, said directional sound pulses being emitted in a sequence at time intervals such that each node emits a directional sound pulse towards the initial location; wherein a second node is emitting a sound pulse at a time interval following the emission of a sound pulse from a first node, a third node is emitting a sound pulse at a time interval following the emission of a sound pulse from the second node, and so on until a last node has emitted a sound pulse; whereby the sequential emission of sound pulses from the same side directional sound generators in subsequent nodes creates a spatial effect and an illusion of a sound travelling towards the target location and thus encourages the individual to follow the sequentially emitted sounds pulses.

In one embodiment, the time interval is constant. The pathway may be inside a tunnel or other confined space, and the target location may comprise an emergency exit or another exit from the tunnel or other confined space, and the sound pulse duration may be determined such that it is significantly shorter than the reverberation time for the tunnel or other confined space. In one embodiment, the method is executed in multiple segments of nodes, either simultaneously or at different intervals. The method may be executed by the invented auditory guidance system.

Brief description of the drawings

These and other characteristics of the invention will become clear from the following description of embodiments of the invention, given as non-restrictive examples, with reference to the attached schematic drawings, wherein:

Figure 1 is a schematic illustration of an embodiment of the auditory guidance system according to the invention; and

Figure 2 is a schematic illustration of an embodiment of the auditory guidance method and system according to the invention;

Figure 3 is a schematic illustration of another embodiment of the auditory guidance system according to the invention;

Figure 4 is a schematic illustration of another embodiment of the auditory guidance method and system according to the invention

Detailed description of embodiments of the invention

The following description may use terms such as “horizontal”, “vertical”, “lateral”, “back and forth”, “up and down”, ”upper”, “lower”, “inner”, “outer”, “forward”, “rear”, etc. These terms generally refer to the views and orientations as shown in the drawings and that are associated with a normal use of the invention. The terms are used for the reader’s convenience only and shall not be limiting.

Referring initially to figure 1, the invented auditory guidance system comprises a plurality of nodes 2 arranged along a pathway 1. The pathway 1 may be a roadway inside a tunnel or any other surface in a confined space (such as a mine shaft, rail tunnel, corridor) or room. The pathway 1 may also be in the open, out of doors. The nodes 2 are arranged at intervals along the pathway, on a wall along the pathway, in a ceiling above the pathway, or on ant other suitable support. It should be understood that there may be several more nodes than what the figure indicates, for example in a long tunnel. The distance between the nodes may be known or be determined by the system, for example as described by EP 3629 604 A1. The distance between the nodes may for example be between 10 and 30 meters, but this invention shall not be limited to this interval.

In figure 1, the pathway 1 is inside a confined space having walls 10 with side exits (e.g. emergency exits) 3, a fire extinguisher 5 and an emergency phone 6, and the nodes 2 are connected to one of a plurality of switches 7 and controlled by a control system 8. However, the invention shall not be limited to this configuration.

Reference number 4 denotes a target area for the auditory guidance performed by the nodes 2. A target area may for example be at a tunnel opening or the exit from a corridor or other confined space, or one of the emergency exits 3. These areas 4 and exits 3 will therefore in the following also be referred to as “target locations”.

Each node 2 comprises two directional sound generators 9a,b that each are configured to emit sound in a predetermined direction. The directional sound generators may be assembled in a common housing, but not necessarily. In the embodiment illustrated in figure 1, the two directional sound generators 9a,b are pointing along the pathway and in opposite directions.

The directional sound generators 9a,b may be loudspeakers, for example loudspeakers with small apertures arranged into an array. The left and right facing directional loudspeakers in each node provides for optimal use of acoustic energy. For example, referring to figure 2, a person located between two nodes 21, 22 will perceive the sound generated by the right-hand sound generator 9a1 as being substantially (e.g. more than 12dB) lower than the sound generated by the left-hand sound generator 9b1 of the same node 21.

The use of such directional loudspeakers contributes to reducing the reverberation effects that may be pronounced in confined spaces, such as tunnels. This is an advantage over the prior the non-directional loudspeakers of the prior art PA systems, where reverberation effects may last several seconds and render precise auditory guidance impossible.

Each sound generator 9a,b in each node 2 is configured and controlled (e.g. via the control system 8) to emit a sound pulse A with predefined characteristics (e.g. duration, pitch, volume). Examples of emitted sound pulses are bell chimes, sound of footsteps on pavement, but a number of other sounds are conceivable. The system may be configured to emit the same sound pulse from all the nodes, or the sound pulse characteristics and type may be different between the nodes. The nodes are configured to be activated in a sequence, from an initial location L and towards the target location 4.

Sound generators 9a,b in each node 2 may be controlled to emit the same sound pulse at the same time, or to emit sound pulses in a desired sequence, as will be explained in the following, with reference also to figures 2-4.

If it is desirable to guide one or more individuals P away from a location L, where for example a fire E or other critical event may have occurred, to a target location (e.g. a tunnel opening 4 or an emergency exit 3), the invented auditory guidance system may be operated in a manner described in the following.

A node 21, which is the closer one to the individual P (and therefore for the purpose of illustrating the method is designated as a first node), is activated such that its sound generator 9a1 facing the initial location L emits a directional sound pulse A. Then, after a time interval Δt, a subsequent, second, node 22, which is adjacent to the first node 21 but farther away from the initial location L, is activated such that its sound generator 9a2 facing the first node 21 emits a directional sound pulse A. Following another time interval Δt, a third node 23, which is adjacent to the second node 22 but closer to the desired location 4, is activated such that its sound generator 9a3 facing the second node 22 emits a directional sound pulse A. Figure 2 illustrates three nodes between the initial location L and the target location 4, but it will be understood that the system may comprise fewer (at least two) or more nodes, e.g. nodes 21-n. For example, figure 3 illustrates 13 nodes 2 arranged along a passageway 1. It should also be understood that the other sound generators (i.e.9b1-n) will be activated in a similar manner if it is desirable to guide individuals in the opposite direction along the pathway.

For an individual P between nodes 1 and 2, the sound pulse A emitted from the sound generator 9a1 in the first node 21 will be perceived as being at a lower level than the sound pulse A emitted from the sound generator 9a2 in the second node 22. This directionality assures that there is reduced perception of incoming sound from the node 21 compared to perception of departing sound from nodes 22 and then 23. The sequential emission of sound pulses A from the same side directional sound generators 9a1-n in subsequent nodes 21-n creates a spatial effect and an illusion of a sound travelling towards the target location 4. This encourages the individual to follow the sequentially emitted sounds pulses towards the target location. Optionally, the sound pulse emission may be interrupted at intervals by voice instructions such as “follow the sound to safety.” The directional effect helps remove ambiguity as to which way to go, and provides an imperative for moving in the desired direction, away from the initial location (e.g. a fire) and towards the target location.

The sound pulse duration tA and time interval Δt may be controlled or pre-programmed according to the specific environment. For example, if the pathway 1 is inside a tunnel og similar passage, the sound pulse duration tA is advantageously significantly shorter than the tunnel reverberation time. If, for example, the tunnel reverberation time is between 2 and 4 seconds, the sound pulse duration tA may preferably between 0.2 and 0.5 second, and the time interval Δt may be between 0.5 and 1 second. The sound pulse duration tA may be constant or may be different for each node.

If the target location (e.g. emergency exit 3 or tunnel opening 4) is far away from the initial location L, for example as illustrated in figure 3 (a total of 13 nodes), the delay from the first sound pulse is emitted from the first node 21 and the last sound pulse is emitted from the last node 2n (in figure n=13), may be unacceptably long. It may therefore be desirable to activate groups of nodes individually, for example at the same time. This is illustrated in figure 4, where an activation sequence corresponding to the one described above is shown as being be repeated on adjacent groups G of nodes. The pathway is thus divided into smaller segments and the sound level may be adjusted such that multiple segments G can play at the same time without being heard from another section. The number of nodes per segment will vary (depending on for example the distance between the nodes, acoustical properties of the environment, the sound to be used). These parameters may be measured (e.g. by microphones at or in the nodes) and the sound emission may be adjusted accordingly.

The invented auditory guidance method and system is particularly useful for evacuating individuals from a tunnel or other confined space when visibility is low or non-existing, for example in the event of a fire.

Krav

Claims1. An auditory guidance system for installation along a pathway (1) between an initial location (L) and a target location (3, 4), comprising a plurality of nodes (21-n) arranged at intervals along the pathway, wherein a first node (21) is the closer node to the initial location (L) and a last node (2n) is the closer node to the target location (3, 4), characterized in that- each node (21-n) comprises one or more directional sound generator (9a,b) which is configured to emit a sound pulse (A) towards the initial location (L), in a sequence from the directional sound generator (9a1) in the first node (21) to the directional sound generator (9an) in the last node (2n), each sound pulse emission being interrupted by a constant time interval (Δt), and- each node is configured to emit sound in a predetermined direction, and the sound generators (9a,b) within each node are pointing in opposite directions along the pathway (1).2. The system of claim 1, wherein the directional sound generators (9a,b) are loudspeakers with small apertures arranged into an array.3. The system of any one of claims 1-2, wherein each sound generator (9a,b) in each node (21-n) is configured and controlled via a control system (8) to emit a sound pulse (A) with predefined characteristics.4. The system of claim 3, wherein said characteristics comprise duration (tA), pitch, volume.5. The system of claim 3 or claim 4, wherein said sound pulses comprises bell chimes or sound of footsteps on pavement.6. The system of any one of claims 3-5, wherein the system is configured to emit the same sound pulse from all the nodes.7. The system of any one of claims 1-6, wherein the nodes are configured to be activated in a sequence, from the initial location (L) and towards the target location (4). 8. The system of any one of claims 1-7, wherein sound generators (9a,b) in each node are controlled to emit the same sound pulse at the same time, or to emit sound pulses in a desired sequence.9. The system of any one of claims 4-8, wherein the sound pulse duration (tA) is constant.10. Use of the system as defined by any one of claims 1-9 as an evacuation system in a tunnel or other confined space, and where the target location is an emergency exit (3) or another opening (4) out of the tunnel or confined space.11. An auditory guidance method, for guiding at least one individual (P) along a pathway (1) from an initial location (L) to a target location (3, 4), characterized by emitting directional sound pulses (A) from a plurality of nodes (21-n) arranged at intervals along the pathway between the initial location (L) and the target location (3, 4), said directional sound pulses being emitted in a sequence at time intervals (Δt) such that each node (21-n) emits a directional sound pulse (A) towards the initial location (L); wherein a second node (22) is emitting a sound pulse (A) at a time interval (Δt) following the emission of a sound pulse (A) from a first node (21), a third node (23) is emitting a sound pulse (A) at a time interval (Δt) following the emission of a sound pulse (A) from the second node (22), and so on until a last node (2n) has emitted a sound pulse (A);whereby the sequential emission of sound pulses from the same side directional sound generators in subsequent nodes creates a spatial effect and an illusion of a sound travelling towards the target location and thus encourages the individual to follow the sequentially emitted sounds pulses.12. The method of claim 11, wherein the time interval (Δt) is constant.13. The method of any one of claims 11-12, wherein the pathway (1) is inside a tunnel or other confined space, and the target location comprises an emergency exit (3) or another exit (4) from the tunnel or other confined space, and wherein the sound pulse (A) duration (tA) is determined such that it is significantly shorter than the reverberation time for the tunnel or other confined space. 14. The method of any one of claims 11-13, wherein the method is executed in multiple segments (G) of nodes (21-n), either simultaneously or at different intervals.15. The method of any one of claims 11-14, executed by the auditory guidance system as defined by any one of claims 1-9. Patentkrav1. Et auditivt veiledningssystem for installasjon langs en vei eller bane (1) mellom en initiallokasjon (L) og en mållokasjon (3, 4), omfattende et flertall noder (21-n) arrangert i intervaller langs veien, der en første node (21) er den nærmere noden til initiallokasjonen (L) og en siste node (2n) er den nærmere noden til mållokasjonen (3, 4), karakterisert ved at- hver node (21-n) omfatter én eller flere retningslydgenerator (9a,b) som er konfigurert for å sende ut en lydpuls (A) mot initiallokasjonen (L), i en sekvens fra retningslydgeneratoren (9a1) i den første noden (21) til retningslydgeneratoren (9an) i den siste noden (2n), der hver lydpulsutsendelse avbrytes av et konstant tidsintervall (Δt), og- hver node er konfigurert for å sende ut lyd i en forhåndsbestemt retning, og lydgeneratorene (9a,b) i hver node peker i motsatte retninger langs veien (1).2. Systemet som angitt i krav 1, der retningslydgeneratorene (9a,b) er høyttalere med små åpninger arrangert i en matrise.3. Systemet som angitt i et hvilket som helst av kravene 1-2, der hver lydgenerator (9a,b) i hver node (21-n) er konfigurert og styrt via et styringssystem (8) for å sende ut en lydpuls (A) med forhåndsbestemte kjennetegn.4. Systemet som angitt i krav 3, der nevnte kjennetegn omfatter varighet (tA), tonehøyde, volum.5. Systemet som angitt i krav 3 eller krav 4, der nevnte lydpulser omfatter klokkeklang eller lyd av fottrinn på fortau.6. Systemet som angitt i et hvilket som helst av kravene 3-5, der systemet er konfigurert for å sende ut den samme lydpulsen fra alle nodene.7. Systemet som angitt i et hvilket som helst av kravene 1-6, der nodene er konfigurert for bli aktivert i en sekvens, fra initiallokasjonen (L) og mot mållokasjonen 8. Systemet som angitt i et hvilket som helst av kravene 1-7, der lydgeneratorene (9a,b) i hver node styres for å sende ut den samme lydpulsen på samme tid, eller for å sende ut lydpulser i en ønsket sekvens.9. Systemet som angitt i et hvilket som helst av kravene 4-8, der lydpulsvarigheten (tA) er konstant.10. Bruk av systemet som angitt i et hvilket som helst av kravene 1-9 som et evakueringssystem i en tunnel eller annet innelukket rom, og der mållokasjonen er en nødutgang (3) eller annen åpning (4) ut av tunnelen eller det innelukkede rommet. 11. En fremgangsmåte for auditiv veiledning, for å veilede minst ett individ (P) langs en vei (1) fra en initiallokasjon (L) til en mållokasjon (3, 4), karakterisert ved å sende ut retningsbestemte lydpulser (A) fra et flertall noder (21-n) arrangert i intervaller langs veien mellom initiallokasjonen (L) og mållokasjonen (3, 4), der nevnte retningsbestemte lydpulser sendes ut i en sekvens med tidsintervaller (Δt) slik at hver node (21-n) sender ut en retningsbestemt lydpuls (A) mot initiallokasjonen (L); der en andre node (22) sender ut en lydpuls (A) ved et tidsintervall (Δt) etter utsendelsen av en lydpuls (A) fra en første node (21), en tredje node (23) sender ut en lydpuls (A) ved et tidsintervall (Δt) etterfølgende utsendelsen av en lydpuls (A) fra den andre noden (22), og så videre inntil en siste node (2n) har sendt ut en lydpuls (A);hvorved den sekvensielle utsendelsen av lydpulser fra retningslydgeneratoren som er vendt mot samme side i etterfølgende noder skaper en romeffekt og en illusjon av en lyd som beveger seg mot mållokasjonen og slik oppfordrer individet til å følge de sekvensielt utsendte lydpulsene.12. Fremgangsmåten som angitt i krav 11, der tidsintervallet (Δt) er konstant.13. Fremgangsmåten som angitt i et hvilket som helst av kravene 11-12, der veien (1) er inne i en tunnel eller annet innelukket rom, og mållokasjonen omfatter en nødutgang (3) eller en annen utgang (4) fra tunnelen eller andre innelukkede rom, og der lydpulsens (A) varighet (tA) bestemmes slik at den er vesentlig kortere enn etterklangstiden for tunnelen eller det innelukkede rommet. 14. Fremgangsmåten som angitt i et hvilket som helst av kravene 11-13, der fremgangsmåten utføres i flere segmenter (G) av noder (21-n), enten samtidig eller ved ulike intervaller.15. Fremgangsmåten som angitt i et hvilket som helst av kravene 11-14, utført av det auditive veiledningssystemet som angitt i et hvilket som helst av kravene 1-9.
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US 20070279242 A1 (A1)

WIJNGAARDEN et al. Auditory Evacuation Beacons, L. Audio Eng. Soc., Vol. 53, No. 1/2, pages 44-63, 2005 January/February ()

IT MI20131421 A1 (A1)

TRONSTAD et al. Sound signals to improve evacuation in road tunnels, Fire Safety Journal 125 (2021) 103431 ()

EP 3629604 A1 (A1)

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