librosa.C_weighting¶

librosa.C_weighting(frequencies, *, min_db=- 80.0)[source]¶

Compute the C-weighting of a set of frequencies.

Parameters

frequenciesscalar or np.ndarray [shape=(n,)]: One or more frequencies (in Hz)
min_dbfloat [scalar] or None: Clip weights below this threshold. If None, no clipping is performed.

Returns

C_weightingscalar or np.ndarray [shape=(n,)]: C_weighting[i] is the C-weighting of frequencies[i]

See also

perceptual_weighting
frequency_weighting
multi_frequency_weighting
A_weighting
B_weighting
D_weighting

Examples

Get the C-weighting for CQT frequencies

>>> import matplotlib.pyplot as plt
>>> freqs = librosa.cqt_frequencies(n_bins=108, fmin=librosa.note_to_hz('C1'))
>>> weights = librosa.C_weighting(freqs)
>>> fig, ax = plt.subplots()
>>> ax.plot(freqs, weights)
>>> ax.set(xlabel='Frequency (Hz)', ylabel='Weighting (log10)',
...        title='C-Weighting of CQT frequencies')