Sound is perceived by the human ear thanks to changes in energy in air molecules. Sound is an alternating compression and rarefaction of air molecules produced by a sound source. Top, we see an illustration of a speaker, which produces changes in air pressure that are picked up by our eardrums. Then below, different ways
Tuning Lever Design & Maintenance by Keith Bowman, RPT INTRODUCTION The tuning lever or “hammer” is simply a specialized wrench that enables a piano technician to apply a torquing force sufficient to overcome tuning pin friction. But unlike most other technical professions, this tool bears the great burden of constant use. Therefore, it is important
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