You can make tones yourself using Audacity. Here Go to generate->tone-> then set what frequency and length you want. You can't set the specific dB level though.
//content.invisioncic.com/y282845/emoticons/word.gif.64b12e39f936af3b4fff38a1c0bd0244.gif Audacity works great for creating your own test tones(and its free //content.invisioncic.com/y282845/emoticons/greedy.gif.5a53e6246569d7ab79867170f3b06629.gif). Maybe you couldn't before, but now you can set the dB level in increments of -3. ie 0, -3, -6, -9, -12 etc.