Relationship between suona insert depth and timbre

The deeper the tone, the deeper the tone. The deeper and longer the suona core is inserted, the lower the sound frequency and the lower the timbre, but in fact the lowest is the alto; The shallower and shorter the suona core is inserted, the higher the sound frequency will be and the clearer the timbre will be. Suona core is the source of the pronunciation of suona, and its thickness has an influence on the sound quality and volume of suona.