找了个AI让他写的，我也不知道啥意思

import numpy as np
from scipy.io import wavfile
from scipy.signal import butter, filtfilt

def filter_low_frequency(input_file, output_file, cutoff_frequency=100, order=6):
    # Read the wav file
    sample_rate, data = wavfile.read(input_file)
    
    # Design the high-pass filter
    nyquist_frequency = 0.5 * sample_rate
    normalized_cutoff = cutoff_frequency / nyquist_frequency
    b, a = butter(order, normalized_cutoff, btype='high', analog=False)
    
    # Apply the filter
    filtered_data = filtfilt(b, a, data)
    
    # Ensure the filtered data is in the correct format
    filtered_data = np.int16(filtered_data)
    
    # Write the filtered data to a new wav file
    wavfile.write(output_file, sample_rate, filtered_data)

# Example usage
input_file = "1.wav"
output_file = "1_filtered.wav"
filter_low_frequency(input_file, output_file)

【 在 feng321 的大作中提到: 】
: 这个，chatgpt可以写吧？
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