Detecting sand 'singing' on the beach

Scientists recently discovered 'singing' sands on Hainan Island. This is the first time this strange phenomenon has been recorded on the coast of China.


"The discovery of this miraculous natural phenomenon will provide technical support for the development and protection of tourism resources in Hainan," said the Northwest Institute of Environmental Resources and Resources (NIEER) of the Chinese Academy of Sciences. said.

"Singing" sand - also known as "shaking", "whistling" sand or "music" sand - usually occurs in sandy areas of deserts or coastlines. Due to a combination of physical characteristics, including grain size and composition, sand has naturally generated sound in the wind.

China has recorded sand "singing" in many areas, including the famous Jihat Mountain, located near the Thousand Buddha Mogao Cave in Dunhuang City, northwest Gansu Province. Such sights are very attractive to tourists who want to experience the strange phenomenon.

However, this is the first time that "singing" sand has been recorded on China's coastline, according to Xinhua News Agency.

"The distribution of coastal sandbars is considered to be a reflection of the quality of the beaches. It has long been assumed that coastal China does not have quality sandbanks, and our latest study has offers a new answer," said Qu Jianjun, a NIEER researcher and study leader.

The NIEER team also discovered many "singing" sandbanks along the coast of Clearwater Bay, the Shenzhou peninsula and other areas in Hainan.

The study shows that the unique geomorphology and breaking dynamics of these bays form fine-sized coastal sand grains.

The scientists studied the characteristics of coastal "singing" sands, such as mineral composition, grain size, surface structure and acoustic characteristics, and compared them to "ca" sands. sing" in the desert.

The surface of coastal sand is often sunken in a typical V-shape, formed by underwater mechanical corrosion. "The surface porous physical structure is an important factor in controlling the acoustic mechanism of singing sand," said Qu.

However, the frequency spectrum of coastal "singing" sand is narrower than that of desert "singing" sand, with a higher proportion of high-frequency sand components and relatively sharp sound, according to the study.


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