A Wall Street Journal Bestseller
A USA Today Bestseller
The definitive book on AI-powered voice technology

The coming age of "voice-first" technology will revolutionize how humans interact with machines. Powered by Generative AI, this shift promises a tech boom as transformative as the internet in the 90s and the mobile revolution in the 2010s.

In The Sound of the Future, digital innovation leader Tobias Dengel reveals how voice-first interfaces will reshape business and society. Drawing from decades of experience leading world-class digital consultancies WillowTree and TELUS Digital, Dengel shows how recent advances like Apple Intelligence and ChatGPT Voice are already transforming how brands design digital experiences well beyond first-generation voice assistants like Alexa and Siri — and why today’s AI-enabled innovations are just the beginning.

Discover how:

Voice interfaces will triple the speed of human-machine communication
AI-powered voice technology will make digital experiences more natural, accurate, accessible, and human
Industries from healthcare to law enforcement will be transformed by hands-free voice capabilities
Companies must adopt voice-first strategies or risk disruption by competitors who do

Dengel explains how “voice-first” experiences are becoming part of the global technology mainstream, serving basic human needs such as safety, speed, accuracy, convenience, entertainment, and sheer fun. He delves into AI applications and how multimodal voice products are making it possible for hundreds of millions of people around the to participate more fully and productively in today's tech-driven world.

Through these real-world examples and deep industry insights, Dengel provides business leaders and digital innovators with actionable strategies to identify voice-first opportunities, drive efficiency, and improve customer satisfaction.

Your journey to a voice-first future starts with The Sound of the Future

About the Author

Tobias Dengel is a visionary leader at the forefront of the AI-powered voice technology revolution. As the founder of WillowTree and President of TELUS Digital Solutions, Dengel brings over three decades of experience in digital innovation to his bestselling writing and sought-after speaking engagements. His unique insights into the transformative power of AI-driven voice interfaces have positioned him as a trusted advisor to Fortune 500 companies across industries.

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