Aengus is speaking in monotone. He asks the audience a rhetorical question, but most of the audience members don't realize this because his voice does not go up at the end of the sentence. This is an example of using poor pitch and inflection.
Step-by-step explanation:
The variation in the tone or pitch of people’s voice during various times in whole conversations where voice increases and decreases referred as inflection. It also describes a departure from normal or even track. Inflection or voice modulation gives the speech a dramatic character. This helps to make the speech more interesting.
When you use this, tone changes also help to express one’s point of view in a more expressive way. Pitch denotes the sound’s quality led by vibration rates which produces it i.e, tone’s high or low degree level. From all this, the scenario acts as an example to low pitch and the inflection. That’s why, Aengus speech does not reach to the audience.