Pretendo que atues como programador. 
Quero que faça as alterações neste script:

from scipy.io.wavfile import write
import sounddevice as sd
import numpy as np
import whisper
import os
import keyboard
import pyperclip
tex1 = ""
model = 'c:\meu\medium.pt'
samplerate = 44100
blocksize = 111
threshold = 0.0125
vocals = [20, 20000]
endblocks = 8
noise_blocks = 3  ### ADDED
paused = False
pyperclip.copy("limpezaaaa")
class StreamHandler:
    def __init__(self):
        self.running = True
        self.padding = 0
        self.noise_counter = 0  ### ADDED
        self.prevblock = self.buffer = np.zeros((0, 1))
        self.fileready = False
        print("\033[96mLoading Whisper Model…\033[0m", end='', flush=True)
        self.model = whisper.load_model(f'{model}')
        print("\033[90m Done.\033[0m")
    def check_pause_toggle(self):
        global paused
        if keyboard.is_pressed('F3'):
            print(" — Foi premida a tecla F3 — ")
            print("---------------- ")
            paused = not paused
    def process_audio_buffer(self, indata, frames, time, status):
        global paused
        self.check_pause_toggle()
        if paused:
            return
        if any(indata):
            freq = np.argmax(np.abs(np.fft.rfft(indata[:, 0]))) * samplerate / frames
            if indata.max() > threshold and vocals[0] <= freq <= vocals[1]:
                self.noise_counter = 0  ### ADDED
                print('.', end='', flush=True)
                if self.padding < 1: self.buffer = self.prevblock.copy()
                self.buffer = np.concatenate((self.buffer, indata))
                self.padding = endblocks
            else:
                ### CHANGED (IF-ELSE structure)
                if self.noise_counter < noise_blocks:
                    self.noise_counter += 1
                else:
                    self.padding -= 1
                    if self.padding > 1:
                        self.buffer = np.concatenate((self.buffer, indata))
                    elif self.padding < 1 and 1 < self.buffer.shape[0] > samplerate:
                        self.fileready = True
                        write('dictate.wav', samplerate, self.buffer)
                        self.buffer = np.zeros((0,1))
                    elif self.padding < 1 and 1 < self.buffer.shape[0] < samplerate:
                        self.buffer = np.zeros((0,1))
                        print("\033[2K\033[0G", end='', flush=True)
                    else:
                        self.prevblock = indata.copy()
        else:
            print("\033[31mNo input or device is muted.\033[0m")
            self.running = False
    def process_transcription(self):
        global tex1, paused
        self.check_pause_toggle()
        if paused:
            return
        if self.fileready:
            print("\n\033[90mTranscribing…\033[0m")
            result = self.model.transcribe('dictate.wav', language='pt', task='transcribe')
            print(f"\033[1A\033[2K\033[0G{result['text']}")
            tex1 = str(result['text'])
            print('2 Fala agora, comprimento da frase já reconhecida é ', len(tex1))
            print('-----------------------------------------------')
            print(tex1)
            tex1 = " ".join([word for word in tex1.split()])
            if len(tex1) > 0:
                keyboard.write(tex1 + " ")
                tex1 = ""
            self.fileready = False
    def listen(self):
        print("\033[92mListening… \033[37m(Ctrl+C to Quit)\033[0m")
        with sd.InputStream(channels=1, callback=self.process_audio_buffer,
                            blocksize=int(samplerate * blocksize / 1000),
                            samplerate=samplerate) as stream:
            while self.running:
                self.process_transcription()
def main():
    try:
        handler = StreamHandler()
        handler.listen()
    except (KeyboardInterrupt, SystemExit):
        pass
    finally:
        print("\n\033[93mQuitting…\033[0m")
        if os.path.exists('dictate.wav'):
            os.remove('dictate.wav')

if __name__ == '__main__':
    main() 



Que alterações podes fazer no código para que  o problema apresentado a seguir se resolva:
Quando eu digo a palavra apaga o sistema vai apagar a última palavra escrita na janela windows atual onde  se está a fazer a transcrição.