No, no human being has intentionally broken the sound barrier without the use of an aircraft or a spacecraft. Breaking the sound barrier, which is approximately 1,225 kilometers per hour (761 miles per hour) at sea level, requires a vehicle or object to achieve a speed greater than the speed of sound.
While there have been instances of individuals reaching high speeds through various means, such as in land speed record attempts or extreme sports, none of these cases involved breaking the sound barrier without the aid of a vehicle. The speed of sound poses significant challenges, including the effects of shock waves and aerodynamic forces, which require specialized equipment and engineering to mitigate.
It's worth noting that Felix Baumgartner, an Austrian skydiver, came close to breaking the sound barrier during his Red Bull Stratos mission in 2012. He jumped from a high-altitude balloon at an altitude of around 39 kilometers (24 miles), and his maximum velocity during freefall was approximately 1,357 kilometers per hour (843 miles per hour), which is faster than the speed of sound at that altitude. However, this achievement was a result of his initial speed and subsequent acceleration due to gravity rather than intentional propulsion without the aid of a vehicle.