About our Quality Logo and our Certification Process

Heaven of Sound's Quality Logo with Trademark Heaven of Sound Quality logo with trademark engraved in one of our singing bowls
Look for the Heaven of Sound logo™ on your new instrument. When you see this emblem it assures you that you are getting the best.
Each Tibetan singing bowl and Burma temple gong engraved with our logo has been individually hand selected and accurately tested by Heaven of Sound™ and is certified to be just as we describe it.
Our custom instruments also proudly bear this promise of excellence!


Raw Tibetan Singing Bowls - Heaven of Sound The repeated heating and hammering required to shape Tibetan singing bowls and Burma gongs produces the unique sound print of each instrument. And the further steps (grinding the top flat, etching, brushing, etc.) to finish the instrument will influence the sound further. A sharp blow or a drop will also change the sound, sometimes damaging it beyond repair.
While we can and do carefully tune the (custom) sound instruments that we ourselves build, we can NOT do this for the individual hand hammered sound instrument like the singing bowls or gongs we carry.

To find the Tibetan singing bowls (and Burma gongs) we offer in our shop, we travel to India and test literally thousands of singing bowls. Approximately only one to two percent of the bowls we test will meet our strict criteria:

Heaven of sound's Certification Process, Audio Spectrum Analysis
  1. The bowl must have a fundamental universal harmonic, chakra frequency or musical note
  2. The bowl must have a supreme sound quality
  3. The bowl must be well made and stable in construction

Because Tibetan singing bowls are hand crafted, the frequency produced will vary slightly around the circumference. To measure the bowl each testing recording is made with the bowl struck all the way around, thus giving an accurate measurement of the frequencies the bowl produces. And as temperature does play a role in the sound produced by metal instruments, we also measure at a room temperature between 68 and 72 degrees F.
Burma Gongs will give pretty much the same frequency reading no matter where on the playing surface, which is the central nipple, it is struck. The above mentioned criteria apply to Burma gongs as well.

The custom instruments that we build, by the nature of their design and construction are tuned (or tunable) to specific frequencies like the Universal Healing Harmonics or Chakra tones.

Due to their nature all these overtone sound instruments have a complex audio spectrum with one or more fundamentals and many more 1st, 2nd and higher overtones and a simple guitar tuner is definitely inadequate and can NOT be used to determine the different harmonics. Therefore we use a professional scientific audio spectral analyzing system to record, analyze, determine and certify the different fundamental and overtone frequencies accurately of our Tibetan singing bowls and Burma gongs for you.
100% certified QualityWhat we certify is that the instrument we certify, when played in the proper* manner, will produce the Universal Harmonic frequencies identified in the certificate. All of the labeled frequencies in the singing bowl or gong will be identified and often additional overtones not noted in the bowl's or gong's labels will also be listed.

Certificated Tibetan singing bowls and Burma gongs at Heaven of SoundThe certificate which we deliver with each single Tibetan singing bowl or Burma gong we sell, identifies the frequency(s) measured, the base or fundamental frequency of the associated Universal Harmonic and the overtones. The certificate also provides a brief description of those frequencies and their uses and placement on or near the body. Any precautions for the use of some of the stronger frequencies will be noted. The audio spectrum of the instrument in the form of a graph is also included. Every singing bowl or gong is identified by our number, the weight of the bowl/gong and the type (Bengali, engraved,matte, plain etc.).

The buyer is encouraged to discover where on the instrument to strike to achieve the optimum sound. Our seminars show that the favored spot will actually vary - different persons will prefer different spots on the same bowl. If you are interested in learning more about your instrument and its healing sound potential you might be interested in registering to one of our introductory seminars and classes.

*): Brass, bronze or copper instruments struck too hard or with unsuitable objects will not ring properly and such actions may damage them. Stringed instruments must be tuned. All instruments and their sound (tones) are influenced by extremes of temperature and humidity.