"So they got away," I said, trying to sound neutral.

"But of course you wouldn't, according to the argument," she said, trying to sound neutral, "since memory would probably not be retained in such an instance."

My voice sounded almost neutral when I asked.

Mahase's deep voice sounded completely neutral, as if it were none of her business.

For example, the sentence "Clara got a puppy" sounds pretty neutral.

He tried to sound neutral, but I could hear the disappointment in his voice.

I tried hard to sound neutral so that he wouldn't get angry.

He tried to sound neutral and dispassionate as he said, "Let's see what she can do."

In the current situation we do not want to say anything that does not sound neutral.