I've watched the

YouTube Video, but none of the advanced techniques (appear) to help me with this one.

I've made one relational clue by combining clues:

Siren Loudness Decibels:

2007 is louder by 5 decibels than $120 which is louder than Rip Tide which is louder than 1994

Sadly, the 1994 model is the quietest. This leaves Rip Tide with two louder, one quieter, $120 with two quieter one louder, and 2007 with three quieter. Each of these then has 2 possible answers.

Anyone see anything else?

(See next reply for the attachment, sorry.)