The bowls are placed on a silk pillow to prevent the sound being altered by the stand. The sound is produced by hitting the bowl with a wooden hammer covered in silk, or by rubbing the hammer around the bowl's edge.
EXIF info:
Nikon Df
Lens: 14mm F/2.8D
Focal Length: 14mm
Aperture: F/6.3
Shutter Speed: 1/200s
ISO Sensitivity: ISO 3200