python计算pcm分贝值_python获取音频音量大小

import array
import numpy as np
import os
from math import log, exp
 
pcm_path = 'test_audio.pcm'#改
def readPCM(fileName):
    file = open(fileName, 'rb')
    pcm_data = array.array('h')
    size = int(os.path.getsize(fileName) / pcm_data.itemsize)
    pcm_data.fromfile(file, size)
    file.close()
    return np.array(pcm_data)#/ 32768
 
data = readPCM(pcm_path)
sum_ = 0
for k in range(len(data)):
	sum_+= abs(data[k])
sum_ = sum_/len(data)
print(len(data),max(data),min(data),sum(data>=0),len(data),data.shape)
 
fenbei = 20*log(max(data)/65535,10)
fenbei = 20*log(sum_,10)
print('fenbei = ',fenbei)
 
 
 
# import os
# from pydub import AudioSegment
# import wave
# pcm_path = r'test_audio.pcm'
# with open(pcm_path, 'rb') as pcmfile:
#     pcmdata = pcmfile.read()
# with wave.open(pcm_path[:-4] + '.wav', 'wb') as wavfile:
#     wavfile.setparams((1, 2, 16000, 0, 'NONE', 'NONE'))
#     wavfile.writeframes(pcmdata)
 
# def match_target_amplitude(sound, target_dBFS):
#     change_in_dBFS = target_dBFS - sound.dBFS
#     return sound.apply_gain(change_in_dBFS)
 
# # pcm2wav('test_audio.pcm','test_audio.wav')
# sound = AudioSegment.from_file('test_audio.wav', format="wav")  # 加载WAV文件
# # print(sound.channels)
# # normalized_sound = sound.apply_gain(-sound.max_dBFS)
# # print(normalized_sound)
 
 
# db = sound[0].dBFS  # 取得WAV文件的声音分贝值
# dbmax = sound[0].max_dBFS
# print('db = ',dbmax,db)
# normalized_sound = match_target_amplitude(sound, db + 10)  # db+10表示比原来的声音大10db,需要加大音量就加多少，反之则减多少
# normalized_sound.export(path2, format="wav")
 
 
 

参考网址：获取PCM音频数据的声音分贝值_kuangben2000的博客-CSDN博客