recognise the power of the human voice as a means of communication beyond the simple decoding of the words that are used.

Actors, singers, politicians and countless others recognise the power of the human voice as a means of communication beyond the simple decoding of the words that are used. Learning to control your voice and use it for different purposes is, therefore, one of the most important skills to develop as an early career teacher. The more confidently you give instructions, the higher the chance of a positive class response.

Source: Essential Guides for Early Career Teachers: Understanding and Developing Positive Behaviour in Schools By Patrick Garton

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1. How is the bold part parsed? I'm having trouble understanding the grammatical construction of the bold part.
2. What could "beyond" be replaced with?