Which innovative product design, first fully implemented on Broadway in 2018, significantly improved accessibility for audience members with hearing impairments?

The performing arts industry isn't just about talent on stage - it's also about innovative products that enhance the audience experience. From revolutionary ticketing systems to immersive set designs, product innovation shapes how we experience live performances. This trivia question focuses on a groundbreaking product design that transformed Broadway theater accessibility. Test your knowledge of how product design intersects with the performing arts!

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GalaPro captioning app, which provides real-time synchronized captions on personal mobile devices
TheaterEars wireless headset system with directional microphones positioned throughout the venue
StageSense vibration pads installed in select seats that translate audio into tactile feedback
BroadwayListen augmented reality glasses that display subtitles overlaid onto the stage