It's hurtful to point out others personal flaws.
Neva is dictating to Holden because he types fast, but he Is hard of hearing.
Neva wants to let Holden know that he should listen carefully.
Neva tells him this and asks for feedback on her speech volume.
Neva tells him this and points out his hearing problem.
Neva finishes the project and is relieved.
Holden gives up and Neva is stuck with work, ashamed.