An experimental and theoretical investigation of the Nigerian slit gong is reported. It is shown that in tuning the gong the artisan ensures that the frequencies of the two lowest mechanical resonances are nearly coincident with the frequencies of two of the acoustic resonances of the internal cavity. Four possible tuning parameters are identified and the effects of changing these parameters is discussed.
Ashley E. Cannaday, Brandon C. August and Thomas R. Moore, "Tuning the Nigerian slit gong," Journal of the Acoustical Society of America 131, 1566-1573 (2012).
Journal of the Acoustical Society of America