Attach one of these Tunebug Shake sound modules to your bicycle or motorbike helmet and you’ll instantly get a faux ‘surround sound’ experience as the thing vibrates your melon in line with the Bluetooth signal from your player.

The makers claim it’s safer than wearing a headset or headphones, and that seems to make sense. What we’d like to see is a model that you stick directly onto your forehead, now that’s what we call a real sub-woofer. $99.99.

 The Tunebug Shake is an ultra-portable sound generator that can be connected to iPods, MP3 players or mobile phones or used wirelessly using Bluetooth®. When mounted on a bike, skate or snowboard helmet, the Shake creates a surround sound experience.