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Hilmar Lehnert

Hilmar Lehnert is an accomplished audio professional with 35+ years of experience. He holds a Ph.D. in Acoustics, spent 8 years in Academia and held various leadership positions in the industry. Notably, Hilmar led the Acoustics and DSP teams at Bose Corporation and Sonos. He thrives at the intersection of Physics and Perception: looking deep dive into physics and Math to understand why things sound good (or not!). Currently, he works as an independent consultant and serves on the board of several startups.

He has authored 30+ conference and journal papers, holds 36+ granted patents, and has been active an musician for over 45 years

Introduction to Warped FIR Filters

Available in 22 hours and 42 minutes

Warped FIR (WFIR) filters are a hybrid between FIR and IIR filters combining some of the advantages of both. Design methods are similar to FIR filters including arbitrary magnitude and phase response but in contrast to FIR filters, they offer good resolution at low frequencies at very low orders and they can be implemented efficiently. They are a particularly good fit for loudspeaker arrays as deployed in soundbars and Atmos speakers.

The talk will cover:

  1. mathematical fundamentals, 
  2. design process, 
  3. a few examples, 
  4. common real-world issues, 
  5. discussion pros and cons.

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