Answer: Cocktail party effect.
Explanation: Cocktail party effects the the ability of an individual to focus on a particular speech of interest while in a large crowd with lot of noise. With a lot of different sound or conversation entering into the auditory organ, the ability to filter out all these sounds while concentrating on a particular speech is attached to the idea of cocktail effect.
Romina was able to filter out all other sounds and was also able to detect where and who mentioned her name in the midst of a large crowd. Thus is due to the cocktail party effect.