The age-old impulse to hold a seashell to the ear and “hear the ocean” has gained a new twist by an engineer/grandfather who has turned exotic shells into a remarkable acoustic speaker product.

Shelldhwani Speakers, as designed by Vinod Goswami, use specimen seashells for natural amplification that does not require a power source. The seashells amplify the music echo of audio signals from devices such as MP3s, iPods and Smartphones.