Regardless of how much you love your partner, no couple is perfect.

There'll be arguments and you'll make mistakes, but if you put the effort into your relationship, you'll presumably be able to make it work.

But, there are limits to what a couple can endure, and for most people, cheating is one.

I had been dating my former boyfriend for close to two years when I found out he had cheated on me on multiple occasions. While I was devastated, I wasn't completely surprised. I knew something was off, but I couldn't quite put my finger on it.

It turns out, it was all in his voice. Scientists suspect we can detect our partner's infidelity through their speech, which includes greater variation in pitch, better voice quality, and fewer silent pauses.

But how do they know?

According to the Daily Mail, research has shown men who have higher levels of testosterone not only tend to have deeper voices, but are also more likely to cheat.

While I was originally skeptical of these findings, a recent study published in Sage Journals discovered when participants were played recordings of strangers speaking, they successfully rated cheaters as "more likely to cheat" than non-cheaters.

"These findings expand upon the idea that the human voice may be of value as a cheater detection tool and very thin slices of vocal information are all that is needed to make certain assessments about others," researchers wrote.

Despite all participants being unaware of the background information of any of the strangers, women were better at this experiment compared to men.

However, the people who had their voices recorded had similar "pitch and attractiveness, who were of similar size and shape, and had similar sexual histories (aside from cheating)," which means these components had no impact on the results.  

So we uncovered the secret about men, but what about women?

While researchers are still unaware if this association applies to women as their pitch changes every month during ovulation (unless they're using contraceptive pills). Despite no physical cues that they're near ovulation, men are reported to find a woman more attractive when they're more fertile.

Interestingly enough, one's voice doesn't only change if they're cheating or going through ovulation. When men meet an attractive person, they tend to talk in a deeper pitch, and both genders increase the variation in their voices to sound more dynamic than monotonous, a study published in Evolution & Human Behavior reports.  

They essentially state that we could determine if someone is interested in us solely based on the sound of their voice.

Kind of crazy isn't it?

Have you ever noticed changes in your significant other's voice?