For once I do actually recognise the artist of the strip below... it's the famous Andre Franquin.
Ah, how wrong can one be...! So close, yet so wrong. If you check the comments to this entry you'll find that George and Marc-André have managed to identify the original strip as 'Starter', originally a character created by Franquin to introduce various features on cars in Spirou . He, and his sidekick Pipette, also appeared in a number of comic strip stories. The particular story below is, I believe, a reprint of the story 'La bulle du silence' which appeared in issues 1433-1458 of Spirou in 1965.
The artist, however, is not Franquin but his long-time assistant Jidéhem (the pen-name of Belgian writer Jean De Mesmaeker). Jidéhem has a brief entry at Wikipedia and a slightly longer entry at Wikipedia Français. According to the BDoubliées site, the storyline for the above tale was penned by Vicq (the pen-name of Belgian writer Antoine Raymond).