In The Denpa Men (3DS) When it says "Go to a place with more radio waves" what does it exactly mean?

I got this game and I quite enjoy it! I just have a question if anyone knows: So when I first went catching these "Denpa" Men, I went outside to get more room to move around. Later, after I died from that dang Wolfbear or whatever, I sat down on my chair inside and went to catch more. Although, I only got 1 before the orange one came (Herbert?) and told me that I should go somewhere else with more radio waves. Is that legit? What does it exactly mean?

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