Hi there,
Thank you for taking the time to share your feedback with us.
We were glad to hear you enjoyed the overview of the city we provided. In terms of the sound, the sound issues are caused by varying acoustics in the city. In future, if you have issues hearing the sound system I recommend asking the driver to adjust the sound. They would be more than happy to do so and this would resolve any issues due to poor sound.
Many thanks again,
All the best,
Big Bus Tours Dublin Team