"Not just experience mood swings when she had guests monthly, but also changes the sound".
Recent research suggests men can identify women who are menstruating through their voice, because the voice sounded less attractive woman turned out.
The findings, published in the journal Ethology, psychologists asked three groups of men to listen to voice recordings of ten women at four different points over their menstrual cycle.
Then, the tape played in random order, and the men were asked to guess which ones are the female voice coming months.
This test found 35 percent of men able to guess correctly, and is described as a significant result.
The research results reinforce previous research in 2008 which mentions a woman's voice better heard when the fertile period.
According to the men who took part in this research, the voice of women who are menstruating can be known through the four indicators, namely mood (good-bad), quality (harsh-smooth), pitch (low-high), and speed (slow-fast).
Some of them say that a menstruating woman who has a recording voice lower in tone, quality, and mood.
"The man seems to have determined by selecting the menstrual voice sounds the most interesting. Role of the hormones also make women's voices down, and induce the vocal changes. Vocal production closely with our biology. Example, cells from the larynx and vagina are very similar and show similar hormone receptors, "he said.
