Why Read This Book

You should read this book if you need a single, broad reference on microphone-array methods that combines theory and application: it covers beamforming, direction-of-arrival estimation, spatial filtering and real-world deployment issues. The chapters by leading researchers provide both mathematical foundations and practical insights for building and evaluating multi-microphone audio systems.

Who Will Benefit

Engineers and graduate students working on hands-free audio, teleconferencing, speech enhancement, and array-based acoustic sensing who need both theory and practical guidance.

Level: Advanced — Prerequisites: Familiarity with linear systems and Fourier analysis, basic statistical signal processing (estimation theory, covariance matrices), and undergraduate-level linear algebra and acoustics.

Key Takeaways

• Understand the fundamentals of microphone-array acoustics and spatial sampling
• Design and analyze classical beamformers (e.g., delay-and-sum, superdirective) and adaptive beamformers (MVDR/LCMV)
• Apply DOA and localization algorithms (e.g., MUSIC, ESPRIT, time-delay methods) to acoustic sources
• Implement spatial filtering techniques for speech enhancement and dereverberation
• Model practical issues such as sensor mismatch, array calibration, and near-field effects
• Evaluate real-world performance and system-level considerations for array-based audio applications

Topics Covered

1. Introduction and overview of microphone arrays
2. Acoustic propagation and array signal models
3. Delay-and-sum and classical beamforming
4. Superdirective and optimum beamforming (MVDR/LCMV)
5. Adaptive beamforming and robustness techniques
6. Time-delay estimation and GCC-PHAT approaches
7. Direction-of-arrival estimation (MUSIC, ESPRIT and variants)
8. Source separation and blind source separation for audio
9. Speech enhancement and dereverberation with arrays
10. Array calibration, microphone characteristics and sensor mismatch
11. Practical system design, implementation issues and case studies
12. Applications: teleconferencing, hearing aids, hands-free systems
13. Future directions and emerging topics in microphone-array processing

Languages, Platforms & Tools

How It Compares

This book is an earlier, comprehensive edited survey focused on audio/speech applications; the later Benesty, Chen & Huang book 'Microphone Array Signal Processing' (2008) is more up-to-date and implementation-oriented, while classic array theory texts (e.g., Van Trees) cover broader estimation/detection theory but not audio-specific issues.