A deep voice is a masculine trait that many women find attractive. That could be the reason many women swoon at the sight of hunky actor Idris Elba. Picture: AP

London - It's a masculine trait that many women find attractive – but a researcher has revealed men with deep voices are also considered more likely to cheat.

Women use vocal pitch to judge whether men will make a good partner or not, according to a psychologist.

Viktoria Mileva, a postdoctoral fellow in psychology at the University of Stirling, said that the "cads versus dads" theory suggests more dominant, masculine men are not as paternal or family-oriented as less dominant, masculine men.

Research has shown women tend to prefer deeper-voiced, more masculine-sounding men, especially when women are near ovulation. Dr Mileva said: "This may be because partnering with deeper-voiced men could lead to genetically healthier children."

READ: You can tell if someone is attracted to you by their voice

However, when women are breastfeeding or have children, she said, they are more likely to prefer men with lower-pitched voices, as deeper-voiced men are also viewed as less trustworthy and potential cheaters.

Dr Mileva added that women were more likely to go for deeper-voiced men as short-term rather than long-term partners.

In an article for website The Conversation, she also explained how men’s voices tend to go deeper when talking to people they find attractive – and how both sexes vary their pitch to increase attraction.