This event is free and open to the public.
Abstract
Traditional measurement techniques based on Fourier analysis often struggle to capture the transient, non-stationary, and spatially complex behaviours of loudspeaker systems and acoustic environments. This presentation introduces a new methodology based on single-frequency and multi-frequency post-processed wavelet transforms, offering a flexible framework for decomposing signals into time-frequency components with controllable resolution.
By integrating these techniques into measurement and tuning workflows, practitioners gain deeper insight into modal interactions, alignment errors, and room acoustic anomalies. Single-frequency wavelets provide precision in narrowband analysis, while multi-frequency approaches enable broadband characterization and transient detection. Post-processing strategies further enhance interpretability, allowing actionable information to be extracted from complex acoustic data.
The session will combine theoretical foundations with practical demonstrations, including case studies in loudspeaker alignment, room equalization, and transducer monitoring. Attendees will learn reproducible protocols that can be applied in both laboratory and field environments, bridging academic research with industry practice.
Biography
Francisco Monteiro, Senior Power Amplifier Engineer, Paradigm Electronics Canada
Francisco Nunes Monteiro is an Electronic Engineer based in Ottawa, Canada, whose career is defined by 25 years of continuous progression and technical specialization in the professional audio industry. He has consistently moved from hands-on assembly and repair roles into increasingly senior engineering and directorial positions, culminating in his current focus on advanced power electronics and acoustic software. He holds a Master of Lifelong Learning in Comsol Multiphysics Modeling and a Degree in Electronic Engineering.
Monteiro’s professional journey began at Studio R Electronics LTDA, where he spent nearly two decades. Starting in roles from Assembler (1999) and Technical Assistant (2001), he gained invaluable insights into product weaknesses. This foundational knowledge propelled his advancement to Development Engineer and, eventually, to Principal Hardware Engineer (2010–2015). In these senior roles, he led the development of high-power professional audio amplifiers and line array systems. His technical success transformed the company’s product line, notably by reducing four-unit rack amplifiers to powerful, cost-effective one-unit designs, helping Studio R secure its position as a market leader in the Brazilian professional audio sector.
Prior to his current role, Monteiro served as a Consultant and Chief Engineer in Electronics and Acoustics for Oversound Speakers (2015–2022), where he was responsible for developing a complete line of amplifiers and active professional sound systems and establishing new quality control and R&D facilities.
Building on his deep hardware and consultancy expertise, Monteiro transitioned into entrepreneurship by founding F.MonteiroScience (2019). As Principal Development Engineer and Director, he focused on the R&D of signal acquisition and analysis software, most notably developing CrossLite+. This software achieved global recognition as a standardized measurement solution, cited in major industry texts and used by leading institutions like IRCAM Centre Pompidou Paris. This period also saw the creation of the Transducer Power Monitor (TPM), showcasing his ability to integrate sophisticated hardware (laser displacement sensors) with real-time software for precise performance monitoring.
Since 2022, Monteiro has served as a Senior Power Amplifier Engineer at Paradigm Electronics, focusing on Analog electronics and cutting-edge global feedback Class D amplifier design in high-fidelity home theater systems. Throughout his career, he has continually leveraged his skills in Digital Signal Processing (DSP) and product certification to drive technological advancements across the industry.