The keyboard clatter two desks over is doing more for your stress than the actual work. You don't need another app to block sound. You need a barrier. This Acouline panel in Char 040 clips onto your 1500mm desk and raises a 600mm wall of high-density material right at ear level. The dark, near-black finish disappears behind your monitor and keeps the visual noise as low as the audio. 50mm rounded corners mean no sharp edges catching sleeves or cables. Fit it in under two minutes. The open-plan hum drops. You get back to the spreadsheet
