Broadcaster Marty Sheargold's radio show breached decency rules when he voiced derogatory on-air remarks about women's sport, the communications watchdog has found.

Sheargold and Triple M parted ways a day after he compared Matildas players to "year 10 girls" during a segment on his show in February.

An Australian Communications and Media Authority investigation found Triple M and three sister stations breached the Commercial Radio Code of Practice by broadcasting sexist content on the program.

It found the sexist comments, expressed in a demeaning and sarcastic tone, demonstrated a level of contempt and disdain for women's sport, and more generally of women.

Authority member Carolyn Lidgerwood says the "demeaning and insulting" comments went beyond generally acceptable standards of

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