The correct answer is Electrical Energy.
<span>The </span>authentic<span> voice of Bettina is </span>obtained through<span> a transducer, which is the microphone which converts the sound </span>energy<span> to </span>electric<span>. </span>it's far<span> then amplified </span>by<span> an amplifier </span><span>and </span>introduced<span> to the </span>target audience by means of some other<span> transducer, such as the speakers which </span>changes the electrical energy lower back<span> into sound </span>energy<span> at a louder </span>stage.
