Let us unpack:

More like chill-ary

First, Clinton does not go “up an octave” with every word, according to Rosario Signorello, a linguist who examined the speeches of many major political leaders, including Clinton and Donald Trump, for a recent poster presentation. Instead, Clinton tends to lower her pitch over the course of speeches, perhaps in an attempt to seem more dominant. Trump is the one who rises as he goes, Signorello found—a good way to keep emotions swelling.

The mic effect

But several experts said Clinton does run into problems at the microphone occasionally. According to Amee Shah, an associate professor of health science at Stockton University, during rallies Clinton seems to breathe from her chest and neck, rather than her belly. That can make her sound too strained—and yes, loud—through a microphone, even when she sounds normal in smaller gatherings.

Likable enough?

Shah also noticed that Clinton has cleaned up her voice and accent over time, largely wiping away her Midwestern folksiness and Arkansas softness. Today, her clear, careful emphasis might actually be working against her: People like presidents whose voices have a little bit of character.

“A clean accent sounds too perfect,” Shah said. Members of the audience, with their drawls and twangs, can’t relate. “That is why despite the gruffness and harshness in Trump’s voice, many people still prefer his voice over Hillary,” Shah added.

Shah sent us this clip, of Clinton on the campaign trail with Bill in 1992, in which Shah said Clinton sounds more “natural.”

It evidently wasn’t natural enough for the people-on-the-street interviewed for the segment. One woman, with character galore, said, “We got no use fah ha.”

“She’s a very aggressive woman,” another man declared, “and she’s overly ambitious.”

That was just 24 years ago.

The perfectly average woman

When Shah watched several Clinton speeches in a row, she found something, well, unremarkable: Clinton’s voice is about average in pitch and loudness for a woman her age. Clinton could breathe differently, emphasize more interestingly, or perhaps change her accent again (it looks like Texan is up for grabs). But “even if it was an awesome change and she was the best speaker ever,” said Laura Verdun, a vocal coach in Washington, D.C., “there’s still bound to be criticism.”

Clinton is, after all, decidedly un-average in other ways.

As Clinton admitted during her convention speech Thursday, “some people don't know what to make of me.” People don’t tend to know what to make of powerful women in general.

Research has repeatedly shown that female leaders are judged more harshly for their errors than male leaders are, even when they’re doing the exact same job. That could explain why Bernie Sanders, who often sounded like an irritated aardvark, somehow managed to escape the decibel-scolds.