{"width":"100%","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Ftadaoyamaoka.hatenablog.com%2Fentry%2F2016%2F08%2F31%2F214335\" title=\"FFT\u3068\u30a8\u30cd\u30eb\u30ae\u30fc\u306b\u3064\u3044\u3066\u306e\u8003\u5bdf(\u7d9a\u304d) - TadaoYamaoka\u306e\u958b\u767a\u65e5\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","author_url":"https://blog.hatena.ne.jp/TadaoYamaoka/","published":"2016-08-31 21:43:35","blog_url":"https://tadaoyamaoka.hatenablog.com/","provider_url":"https://hatena.blog","title":"FFT\u3068\u30a8\u30cd\u30eb\u30ae\u30fc\u306b\u3064\u3044\u3066\u306e\u8003\u5bdf(\u7d9a\u304d)","description":"\u524d\u56de\u306e\u7d9a\u304d\u3067\u3059\u3002\u5468\u8fba\u306e\u30d1\u30ef\u30fc\u30b9\u30da\u30af\u30c8\u30eb\u306e\u548c\u3092\u6e2c\u308b\u3053\u3068\u3067\u3001\u5468\u6ce2\u6570\u5206\u89e3\u80fd\u306e\u6574\u6570\u500d\u3068\u306e\u305a\u308c\u306e\u5f71\u97ff\u3092\u3069\u308c\u3060\u3051\u6291\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u304b\u8abf\u3079\u305f\u3002\u5468\u8fba3\u3064\u306e\u30d1\u30ef\u30fc\u30b9\u30da\u30af\u30c8\u30eb\u306e\u548c\u3092\u3068\u3063\u305f\u5834\u5408\u306e\u30d4\u30fc\u30af\u306e\u5024\u3092\u3001400Hz\u304b\u3089500Hz\u306e\u9593\u30920.1Hz\u9593\u9694\u3067\u8abf\u3079\u305f\u7d50\u679c\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u3063\u305f\u3002 peaks = [] fset = np.linspace(400, 500, 1001) for f in fset: y = np.sin(2 * np.pi * f * t) Y = np.fft.fft(y) P = abs(Y)**2 P_around = np.convolve(P, np.ones(3)/3, 'val\u2026","version":"1.0","categories":["\u30d4\u30c3\u30c1\u89e3\u6790","FFT"],"url":"https://tadaoyamaoka.hatenablog.com/entry/2016/08/31/214335","author_name":"TadaoYamaoka","type":"rich","height":"190","blog_title":"TadaoYamaoka\u306e\u958b\u767a\u65e5\u8a18","image_url":"https://cdn-ak.f.st-hatena.com/images/fotolife/T/TadaoYamaoka/20160831/20160831212828.png","provider_name":"Hatena Blog"}