The vibration frequency of an object is related to the volume and shape of the material. I have measured sound columns with different hardness, and there is no difference in frequency. Therefore, the so-called pitch or frequency matching is a speculation without scientific basis.

The most important aspect of the pitch column is the end face contact area, full contact is the best, and it has little to do with pitch.

Whether spruce or larch, with a diameter of about 6mm and a length of about 50mm, the vibration frequency is above 3KHz. If you still rely on imagination or speculation, it is recommended to go to a physics teacher for personal testing!

Why is it most suitable to use spruce as a sound column? Because this type of wood is lightweight and precisely meets the mechanical strength required for a piano.

From this, it can be inferred that as long as a certain mechanical strength is achieved and physical dimensions are met, the smaller the quality of the sound column material, the better. In other words, if the thickness and hardness match, the lighter the sound column, the better the effect.

Therefore, a more accurate conclusion can be drawn: spruce materials that have been dried for a long time are more suitable for making sound columns, because the resin components in the wood that have little effect on mechanical strength are reduced, resulting in a decrease in quality.

After 24 hours of placing the shaved sound column in an ultrasonic oscillator filled with alcohol solvent, take it out and cut a length of about 50mm from the same sound column material that was not placed in the solvent. Place it next to the oven and bake it without burning it. After 1 hour, it was found that oil and grease overflowed from the annual ring lines at both ends of the sound column that had not passed through the solvent

Using different materials that have been dried for 5 and 10 years, the experimental results confirmed that there is no difference in oil residue between spruce wood that has been dried for 10 and 5 years