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# `FeatureExtractors`λ₯Ό μν μ νΈλ¦¬ν° [[utilities-for-featureextractors]]
μ΄ νμ΄μ§λ μ€λμ€ [`FeatureExtractor`]κ° *λ¨μκ° νΈλ¦¬μ λ³ν(Short Time Fourier Transform)* λλ *λ‘κ·Έ λ© μ€ννΈλ‘κ·Έλ¨(log mel spectrogram)*κ³Ό κ°μ μΌλ°μ μΈ μκ³ λ¦¬μ¦μ μ¬μ©νμ¬ μμ μ€λμ€μμ νΉμν νΉμ±μ κ³μ°νλ λ° μ¬μ©ν μ μλ μ νΈλ¦¬ν° ν¨μλ€μ λμ΄ν©λλ€.
μ΄ ν¨μλ€ λλΆλΆμ λΌμ΄λΈλ¬λ¦¬ λ΄ μ€λμ€ μ²λ¦¬ μ½λλ₯Ό μ°κ΅¬ν λμλ§ μ μ©ν©λλ€.
## μ€λμ€ λ³ν [[transformers.audio_utils.hertz_to_mel]]
[[autodoc]] audio_utils.hertz_to_mel
[[autodoc]] audio_utils.mel_to_hertz
[[autodoc]] audio_utils.mel_filter_bank
[[autodoc]] audio_utils.optimal_fft_length
[[autodoc]] audio_utils.window_function
[[autodoc]] audio_utils.spectrogram
[[autodoc]] audio_utils.power_to_db
[[autodoc]] audio_utils.amplitude_to_db
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