🌐EnglishEnglishBahasa IndonesiaDeutschEspañolFrançaisItalianoNederlandsPolskiPortuguêsSvenskaРусскийالعربيةفارسیไทย中文日本語EntityQ62531· pop 24spectrumAlso known as frequency spectrumrepresentation of a quantity as a function of frequency or wavelengthAvailable in 23 languagesEspañolFrançaisDeutsch中文日本語РусскийPortuguêsItalianoالعربيةAsturianBasqueConnectionsspectral densityEntity