Energy Movement and Frequency Response 2

Listen to HALLELUJAH by Pentatonix: https://youtu.be/LRP8d7hhpoQ?si=al_0hHvciGEPMB7F 🆓 Get a free room analysis: http://www.acousticfields.com/free-room-analysis ⭐ Acoustic Treatment Build Plans: https://www.acousticfields.com/product/all-in-one-diy-acoustic-treatment-build-plans-package/ 🎓 eBooks & Forum: https://www.acousticfields.com/sign-up-afa/ What is really happening to voice inside your room? In this episode, Dennis Foley from Acoustic Fields continues the series on energy movement, focusing specifically on voice and how wave and ray energy behave in real time within a controlled listening environment. Using an a cappella track (four male voices and one female), Dennis removes instrumentation entirely to isolate how pure vocal energy interacts with the room—no processing, no averaging, just real-time FFT data. To keep things simple, sound is divided into two key energy types: • Wave energy (below ~100–125 Hz): pressure-based, room-dominating low frequencies • Ray energy (above ~100–125 Hz): reflection-based, directional energy that shapes clarity and detail This demonstration is built around a real-world “average” room derived from decades of data: • 11 ft wide • 8 ft high • 13 ft long The treatment strategy uses a balance of: • Pressure-based modules for low-frequency control • Diffusion for reflection management • Absorption (including foam) for mid/high frequency smoothing Dennis walks through live measurements using an RTA app, focusing on: • C-weighted scale • Peak hold readings • FFT (Fast Fourier Transform) for real-time energy tracking Three pressure levels are analyzed: • 75 dB • 85 dB • 95 dB As volume increases, so does the interaction between wave and ray energy, revealing how pressure and reflections must be balanced for accurate frequency response. Here’s what to watch for: Below 100–125 Hz (Wave Energy / Pressure) • How energy builds and moves throughout the room • The impact of pressure on overall response • The foundation of what you hear Above 100–125 Hz (Ray Energy / Reflections) • Smoothness and linearity of response • The role of absorption and diffusion • Where clarity, articulation, and tonal balance live With voice as the source, the results are more focused, making it easier to see how energy behaves without the complexity of instruments. Dennis emphasizes: It’s all about pressure and reflection balance. If those two aren’t working together, your frequency response will never be accurate. This video trains you to recognize: • How energy shifts in real time • How different frequencies behave under pressure • What proper balance actually looks like Understanding this is the key to controlling your room, and ultimately, what you hear. #RoomAcoustics #FrequencyResponse #AudioEngineering #HiFi #AcousticTreatment