What is the sound of emergency warning broadcasting?

An earthquake with a seismic intensity of 6 in Ishikawa Prefecture occurred this morning, but an alarm of the tsunami that always comes out at the time of this earthquake coverage. However, thought that there might be people who have never heard the creepy sound of "Pyro Piropiropio" that can be heard from NHK at the time of the tsunami warning, I tried searching on YouTube. Not only when this sound and tsunami warning is issued, but also when the warning declaration of the Tokai earthquake is issued or when there is a broadcast request such as evacuation order from local governments, remember that the loss is I do not know.

You can hear it from the following address.
YouTube - moment of emergency alert broadcast


Also, you can download the WAVE file containing this sound from the following.

■ Boro Boroboro Signal ~ Scary ~ (Great Earthquake, Tsunami) Signal Decoding of Emergency Warning Broadcasting (EWS) - Intelligent Electronic Experiment

Emergency warning broadcast decoder program for PIC 16 F 84 (Other / other models)

About this sound there is a commentary on the NHK page.

NHK Broadcast Reception Consultation Room

● It will be broadcast only in the following three cases that have a serious impact on human life or property
1) When a warning declaration of the Tokai Earthquake is issued
2) When a tsunami warning is issued
3) When request of broadcasting such as evacuation order is received from the head of the local government

However, if the TV is turned off, I do not hear this sound in the first place, so I thought if it wasteful, an interesting description. It seems that there is also a mechanism that the television switch is turned on automatically when this emergency warning broadcast starts to sound. This was amazing, I did not know.

"Emergency alert broadcasting" contains special signals, and there are also special receivers that recognize the signals. If you use a receiver equipped with this "emergency alert broadcasting support" function, it will automatically start up at the time of signal reception even in the power-on standby state (even when the power is connected but the switch is OFF), it will be possible to know the occurrence of the disaster as soon as possible I can do it. Of course, even if there is no special receiver, you can see emergency warning broadcast either in analog or digital if the switch of the receiver is ON (activated state).

Among the products currently on sale,Sony's BRAVIA, Matsushita Electric's digital tau and VIERA's top modelIt seems that this function is available. It seems to be off by default, but it is very interesting if it actually works properly.

Also, NHK's "[PDF] Automatic activation of mobile terminal by emergency warning broadcastAccording to the document that the emergency alarm signal is received as soon as possible, we are also progressing to develop a structure to receive this emergency alert signal as soon as possible, succeeded in developing a low power consumption version of the standby circuit receiving this signal, even in areas where the radio waves are very weak It seems that it is being studied to incorporate it in remote control of television or mobile phone. It might be wonderfully wary of certainly mobile phones in the middle as soon as they start out automatically and all at once.