Assistive Technology APD

Hi Everyone, 

I've been researching the different types of assistive technology available to help with APD. Does anyone know of any hearing devices that can reduce/filter background noise and make a speaker's voice clearer/more pronounced? I work in hospitality so it is for the most part a noisy and overstimulating environment. Due to the nature of my job I would need something portable and discreet. I have come across Bose Hearphones, but they have been discontinued. I'm wondering if there is anything else on the market that is similar or better?