Optimize airflow: keep line straight, reduce bends to near zero, use larger diameter tube to lower back pressure, keep length short to preserve high‑frequency power, add tuned resonator at end to cancel low‑frequency noise, install high‑efficiency muffler after resonator, keep all joints sealed, use smooth interior finish to reduce turbulence. Keep weight low, avoid unnecessary fittings, test with flow meter to verify pressure drop <5 psi. That yields quiet but still enough power.