Nelson
"There's a few different applications, namely as a means to escape or take out my opponents without them being able to see me." He realized that if he didn't elaborate, Masumi would probably be left wondering just how Murnao would be able to take out a squad of opponents when his jutsu also blinded himself. 

"I should mention that my hearing is well-above that of a normal shinobi. I'm capable of fighting blind and people blinded by the barrier would no doubt make all sorts of noise as they tried to stumble around and find their allies or the enemy." He could almost imagine it now, a whole squadron of ERF fumbling over each-other to find him or each-other. It'd only take a short while for him to move on in and take the whole lot of them out.
Jared
*Masumi nodded. Those were some pretty good applications. Although one thing stuck to him after being told all of that information. He looked away for a moment, then back to the Captain. He gestured to his ears.*

"Are you able to hear everything inside the barrier if you're inside of it?"

*He asked Murano. This kind of information was good to know, for both of them. Incase Masumi went up against this kind of barrier ninjutsu, and also so that Murano knew what they were doing when it came to using the jutsu.*

"Also if it's used as a means of escape, does that mean you're able to make it bigger?"
Nelson
"Those who are inside the barrier are able to hear each-other and what's going on outside, yea. If you're *Outside* The barrier though, you can't hear into it. It makes the area nice little isolated patch." His second question made Murano ponder the jutsu for a few moments. He hadn't considered the possibility of expanding it, as he thought it could only cover a small area. 

"I suppose I could, it'd just take a bit of training. Unfortunately, this was all I had time for. I'm going to go grab some ramen before I head to work, if you wanted to join me." Murano rose from his seat and motioned to leave, gesturing for Masumi to follow if he wanted