Hello Italianmr24,
Thanks for visiting the Apple Support Communities. Pauses are usually caused by Bluetooth interference, something in the area you are in. Please check this article which shows static as a possible symptom of interference: Resolve Wi-Fi and Bluetooth issues caused by wireless interference - Apple Support
This might be specific to the area you are in. Move away and see if it stops occurring. Also, see if you can identify other things in your area that may be causing it. This includes things in your pocket with the phone, as well as AC units, other speakers or audio equipment, metal roofing, etc.
"Avoid physical obstructions in the path of your wireless signal. For example, a metal surface between your Bluetooth mouse and computer could cause the mouse to perform poorly, and a metal-reinforced concrete floor between your Wi-Fi router and Wi-Fi device could cause poor Wi-Fi performance.
- Low interference potential: wood, glass, and many synthetic materials
- Medium interference potential: water, bricks, marble
- High interference potential: plaster, concrete, bulletproof glass
- Very high interference potential: metal"
Thanks.