Deploy manual search personnel in the affected area to directly search for holes and narrow areas to find survivors. Manual search personnel can use the vision to search the affected area. In addition, you can line up to listen to the voices of survivors.
Use high-power loudspeakers or other loudspeaking devices to shout and give instructions to trapped survivors.
Then keep the affected area quiet, and manual searchers listen carefully and mark the area with sound.
Manual search is more accurate than other search methods, but search and rescue personnel carry out manual search in the affected area has certain risks.
Translation: "Yiyan Net"
Use high-power loudspeakers or other loudspeaking devices to shout and give instructions to trapped survivors.
Then keep the affected area quiet, and manual searchers listen carefully and mark the area with sound.
Manual search is more accurate than other search methods, but search and rescue personnel carry out manual search in the affected area has certain risks.
Translation: "Yiyan Net"
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