All Smiles: Lama Tashi in a traditional Assamese japi in Guwahati on Thursday. Picture by S.H. Patgiri

Buddhist monk Geshe Ngawang Tashi Bapu?s golden voice has not only earned him a large fan following around the world and a Grammy nomination to boot, but also apparently aroused the curiosity of scientists.

Tashi today revealed in Guwahati that in 1988, two groups of medical experts examined his throat to unravel the secret behind his vocal chords.

Twice during his world tour that year, doctors at Montreal in Canada and Florida in the US conducted tests to find out how he could produce multi-phonic sounds that give the impression of several singers performing at once.

?Once they inserted a camera through my nose to look at my throat to find out the reason,? the ever-smiling Tashi, popular as Lama Tashi, said during an interaction with the media in Guwahati.

?I felt very sleepy when my throat was examined,? the 38-year-old monk said.

Tashi sheepishly added that he did not ask for the results of the tests.

Tashi?s Tibetan Master Chants has been nominated for the Best Traditional World Music Album at the 48th Grammy awards, to be presented in New York on February 8.

The monk was in Malaysia on December 18 when he came to know from his nephew about the Grammy nomination. ?I was very surprised. It was a pleasant surprise,? he said.

Tashi is the principal of the Central Institute of Himalayan Culture Studies at Dahung, in Arunachal Pradesh, and his music is aimed at ?spreading peace, harmony and love?.

Tashi started learning Buddhist philosophy in 1983 and perfected the Tibetan ?deep voice?, a singing technique that is used during prayer.

A widely travelled man, he has since performed around the world and even lent his voice to the soundtrack for the Hollywood film Seven Years in Tibet.

In April 1999, he performed for the Dalai Lama at Curitiba, Brazil. Later in the year, he enthralled audiences at the World Festival of Sacred Music at the Hollywood Bowl in Pasadena, California, and Central Park in New York.

Tashi has taken the stage at the Carnegie Hall in New York twice ? in 1997 and 1998 ? performing with musical greats like Philip Glass, Natalie Merchant, Michael Stipe, Patti Smith, Ben Harper, Billy Corgan of the Smashing Pumpkins and Sheryl Crow.

Tashi is at present collaborating with musician Lyle Sanford for an album that will also have instrumental accompaniments. ?Tibetan Master Chants contains only chanting in the traditional style, but my next album will be different. It will be like a listener?s guide to chanting,? he said.