It's been years since I've logged in, and HOLY CRAP my account still exists and I remembered the password.
Anyway , back to the topic. First of all those aren't Dayjo's rips, they're just hosted on his servers. That site and the sound rips are really mine! I'm not complaining, it's actually amusing. Yes, the site says "HelpTheWretched", but take look at the index page's source, on one of the first lines.

This shoreline sound has been requested several times before and it's right at the top of my to-do list, along with a couple other missing or needing-an-update LoZ sounds.
FrozenFire is basically right - it uses the NES audio's noise channel, which is also used for drum beats in the LoZ overworld. It'll need to be recorded in several takes and then merged; I might even have to write a script in order to be EXACT in removing the drum beats. But, it won't be hard, and once my 'personal issues' are dealt with in the next couple months, it'll be ready!
Regarding the Link's Awakening shore sounds, thanks for going ahead and cleaning them up. I like to do that when it's severe/distracting, otherwise I supply the sounds 'as-are'. The actual issue though, is the bit-depth of the GB audio. It only allows for 15 volume levels of a given sound, so any fading is subject to the clicks from the volume level suddenly jumping. Minor difference, just wanted to point that out.

Any further questions, please e-mail at the address on "Dayjo's site" because I almost never drop by ZFGC anymore. (No offense, I just don't usually have time!)