The speed of a sound wave does not change if you increase or decrease its frequency. The speed of sound in a given medium is determined by the properties of that medium, such as its density and elasticity, and is independent of the frequency of the sound wave.
In most cases, the speed of sound remains relatively constant for a specific medium under normal conditions. For example, in dry air at sea level, the speed of sound is approximately 343 meters per second. This speed would remain the same regardless of whether the sound wave has a low or high frequency.
However, it is worth noting that the speed of sound can vary slightly with factors such as temperature, humidity, and the composition of the medium. In some media, such as gases, the speed of sound can be influenced by the frequency of the sound wave due to more complex interactions, but this effect is typically small and not linear.
In summary, changing the frequency of a sound wave will not affect its speed in a given medium. The speed of sound primarily depends on the properties of the medium itself, not the frequency of the sound wave.