基于Matlab和小波降噪的钢琴基频测量系统设计

摘要

随着环境的变化,钢琴的基频会发生偏移,影响演奏效果.人工调琴易受生理和心理影响,造成结果的不准确.为了检查出钢琴的基频,采用数字信号处理技术和小波降噪的方法,做了"小字一组"的频率测量实验,获得了钢琴基频的实际数据,为调琴提供准确的依据.%With the change of environment, the deviation of piano's baseband can affect the performance results.For physiological and psychological effects, the artificial tuning makes the result inaccuracy.The wavelet denoising method and digital signal processing technology are used to check out the piano's baseband.Actual data of piano's baseband are acquired by making a frequency measurement test of "one-line octave", an accurate basis is provided for piano tuning.