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DESCRIPTION JP2005304014

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DESCRIPTION JP2005304014
A system and method propagates only interesting sound information to a user who is acoustically
isolated from the sound. This is a particularly useful task for people who work in noisy
environments, enjoy noisy environments, and those who are in soundproof rooms and can not
normally detect significant sounds. By automatically detecting the critical sound, the user can be
alerted by the signal generated in response to the detection of the selected sound information.
[Selected figure] Figure 1
Method and system for propagating sound information
[0001]
The present invention relates generally to detecting sound information in an open environment,
and in particular to propagating selected sound information obtained in an open environment to
an acoustically isolated environment .
[0002]
As acoustic technology finds more and more applications, users of modern acoustic technology
have increased control of the acoustic environment.
Whether it be a person's home, an office, a car, or a street, the sound can be passively suppressed
using soundproofing materials, or it can be active. Can be suppressed by scraping with a
desirable sound such as music. This acoustic isolation from sound is highly appreciated, but is
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often blamed if important sound information does not reach our ears. Sound is a very efficient
means of assessing our environment, and being cut off from sound can often cause problems.
[0003]
To illustrate this issue, consider a few application cases. Today, the driver enjoys good
soundproofing comfort and the ability to raise the volume of the radio so that the sounds outside
the car in the open environment are almost imperceptible in the acoustically isolated
environment inside the car . Clearly this is good when it comes to everyday comfort. However,
isolating the sound can also constitute a serious hazard if the driver can not hear the alarm
sound from other vehicles, or worse, the siren of the emergency vehicle.
[0004]
In addition, people in quiet offices are often unaware when being called or when an emergency
occurs. Pedestrians or those riding bicycles are also in danger when listening to music through
headphones.
[0005]
These are all examples of applications where misunderstandings or emergencies can occur. If the
people in these examples have the ability to selectively allow certain sounds to reach their ears,
their situation will be better to cope with appropriately. With simple soundproofing /
reproduction techniques, the function of selectively enabling certain sounds to reach the ear
becomes very difficult, since all external sounds are equally suppressed.
[0006]
Thus, there is a need for systems and methods for propagating sound to a listener that would
otherwise be acoustically isolated.
[0007]
The system according to the invention detects the selected sound information in real time and
propagates the selected sound information to the listener.
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[0008]
This system constantly monitors the open acoustical environment and then conveys only relevant
information to the listener, usually acoustically isolated.
This information may be conveyed in either form of visual and / or audible messages.
[0009]
The method and system detects selected sound information and propagates that information to
users of the acoustically isolated environment, either by auditory or visual signals.
[0010]
FIG. 1 shows a system 100 for propagating selected sound information according to the
invention.
Sound information 102 is obtained by the microphone 110 from an open environment 101, for
example a room or a street, and converted into an audio signal 103.
[0011]
The audio signal 103 is analyzed 120 and one or more of the set of selected sounds 104 stored
in the memory 135 are detected 130.
The selected sound 104 can be determined in advance. The selected sound may be a critical
sound, a critical sound, or an interest sound such as that produced by a car horn, siren, alarm,
telephone bell, and door bell, or baby's cry. it can.
[0012]
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After a specific selected sound is detected, a signal 105 is generated 140 to alert the acoustically
isolated user 1 from the open environment 101. For example, the user is in the soundproof room
2 or wears the headphones 3 for scraping the sound information 102. In either case, the user is
said to be in an acoustically isolated environment. The signal 105 may be one 150 that aurally
generates the original sound information 102 via the loudspeaker 4 or the headphones 3 or
visually for example via the display device 5 such as light, LED or LCD It can also be generated
160 or other auditory or visual signals.
[0013]
Application Vehicle The present invention is suitable for the following applications. Modern cars
provide excellent sound isolation capabilities. In addition, the car's audio system can provide
sufficient in-car sound to wipe out the sound information 102 from the open environment 101
outside the car. The driver 1 may be surrounded by such an acoustically isolated environment 2
and may not easily notice a horn, a siren or even a malfunction of the car. By placing the
microphone 110 in the open environment 101 external to the car 2, the system 100 can also
detect nearby car horns, emergency vehicle sirens, and even sounds indicating car malfunction.
When this selected sound information is detected 130, either the audio system 4 or the light of
the car console 5 can be used to generate the signal 105.
[0014]
When multiple microphones are used, the direction of the sound information 102 can be
determined. This direction can also propagate via the signal 105. If multiple loudspeakers are
used, the direction of the source of the selected sound information can be simulated by stereo
audio techniques.
[0015]
Headphones Modern headphones can play music very loudly. Some headphones eliminate noise
to minimize external volume reaching the user's ear. When wearing such headphones while the
person is in an open environment, for example riding a bicycle on a busy street or crossing a
busy intersection, the user may It is dangerous if you can not hear selected sound information
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such as a car horn. The system according to the invention can propagate only selected sounds to
the users of the system.
[0016]
Homes In large homes, it may be difficult to hear the baby's voice in another room. The system
100 can propagate the baby's cry from the baby to the acoustically isolated parent. Similarly, the
system can also detect open doors or doors, doorbells, outside pets, malfunction of household
appliances, etc. Speech recognition techniques can also be used to program the system to
respond only to speech from a person with a predetermined identity.
[0017]
Although the invention has been described by way of examples of preferred embodiments, it is to
be understood that various other adaptations and modifications can be made within the spirit
and scope of the invention. Therefore, it is the object of the appended claims to cover all such
variations and modifications as come within the true spirit and scope of the invention.
[0018]
FIG. 1 is a block diagram of a system and method for selectively propagating sound information
according to the invention.
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