Touch upâs should be done minimum 4-6 weeks post the initial treatment. This allows time for eyebrows to heal fully before perfecting them for the second time. Free touch-ups are only valid up to 3 months from initial procedure date.
Re: The Tinny sound? Most folks that are concerned about a tinny noise with aluminum boats are referring to the noise generated by the hull moving through the water (which can be modulated/reduced through many different avenues). You mention vibration and rpms, so I'm guessing that you're not referring to that sound.
Leaving the ends of the PVC open allows for a more expansive sound and lets more treble escape. The weight of the horn keeps the phone from tipping back. lowtechatmo/CC BY-NC-SA 2.0. We have a thing for electricity-free iPhone speakers, especially when they are DIY projects using cool old materials.Flickr user lowtechatmo posted a couple images of their home-brew, low-tech iPhone amp made of PVC and an old bike horn..lowtechatmo/CC BY-NC-SA 2.0.he project looks fairly simple: The bike horn (with it's noise maker removed) had just the right amount of threading on the end to screw into the soft plastic hole, and be flush with the inside of the PVC. It sits directly in front of the tiny mono speaker.