There are different classes for different elements in the audio_features column. They are listed below:
mean_f0_hz: Low Pitch--> value less than 100 Mid Pitch--> value less than 200 - High Pitch--> value greter than 200
loudness_luff:
Very Low Loudness--> values from -65 to -50
Low Loudness --> values from -50 to -40
Moderate Loudness--> values from -40 to -30
High Loudness--> values from -30 to -20
Very High Loudness--> values from -20 and below
dynamic_range: Low Dynamic Range --> values from 0 - 10 Moderate Dynamic Range --> values from 10 - 25 High Dynamic Range --> 25 - 40" Very High Dynamic Range --> 40 and above
clipping_rate: Low Clipping Range --> values from 0 to 0.02 Medium Clipping --> values from 0.02 to 0.05, High Clipping --> values from 0.05 to 0.08, Very High Clipping --> values from 0.08 and above
mean_spectral_centroid: Low Brightness --> values smaller than 800 Medium Brightness --> values from 800 to 1200 High Brightness --> values from 1200 to 1500 Very High Brightness --> values from 1500 and above
speaker_count: 1,2,3,4,5,6,7 {speakers} for 1,2,3,4,5,6,7 speakers respectively
std_dev_d0_hz:
Class 0 --> values betweeen 0.00-30.11
Class 1 --> values betweeen 30.11-60.22
Class 2 --> values betweeen 60.22-90.33
Class 3 --> values betweeen 90.33-120.44
Class 4 --> values betweeen 120.44-150.55
Class 5 --> values betweeen 150.55-180.66
snr_estimate_db:
Class 0 --> for values less than 0 dB Class 1 --> for values between 0 to 20 dB Class 2 --> for values between 20 to 40 dB Class 3 --> for values between 40 to 60 dB Class 4 --> for values between 60 to 80 dB Class 5 --> for values between 80 to 100 dB
speech percentage: Class 0 --> for values between 0-10% Class 1 --> for values between 10-20% Class 2 --> for values between 20-30% Class 3 --> for values between 30-40% Class 4 --> for values between 40-50% Class 5 --> for values between 50-60% Class 6 --> for values between 60-70% Class 7 --> for values between 70-80% Class 8 --> for values between 80-90% Class 9 --> for values between 90-100%
Bandwidth:
Narrowband ---> for Narrowband wideband ---> for wideband
Duration:
Class 0 --> for values between 0-5 seconds Class 1 --> for values between 10-15 seconds Class 2 --> for values between 15-20 seconds Class 3 --> for values between 20-25 seconds Class 4 --> for values between 25-30 seconds