Location History:
- 186 00 Vallentuna, SE (1986)
- 00 Vallentuna, SE (1989)
- Stockholm, SE (2015 - 2020)
Company Filing History:
4 out of 2,597 
4 out of 9 
1 out of 40 
Years Active: 1986-2020
Title: Innovations of Erik Vilhelm Lindahl
Introduction
Erik Vilhelm Lindahl is a notable inventor based in Stockholm, Sweden. He has made significant contributions to the field of audio technology, particularly in the development of systems for loudspeakers. With a total of 11 patents to his name, Lindahl's work has had a considerable impact on the industry.
Latest Patents
Lindahl's latest patents include innovative methods for temperature monitoring in loudspeakers. One of his patents, titled "Methods and Apparatus for Estimating a Temperature of an Electromechanical Transducer," outlines a method that involves receiving an audio signal and providing an output signal to the electromechanical transducer. The method determines whether the magnitude of the audio signal in a specific frequency band exceeds a threshold. If it does, the first impedance of the transducer is calculated based on voltage and current measurements, allowing for an estimation of the transducer's temperature. If the magnitude is below the threshold, a pilot tone is inserted into the audio signal to facilitate the temperature estimation based on a second impedance.
Another significant patent is focused on the control and protection of loudspeakers. This patent describes a nonlinear control system that includes a controller, an audio system, and a model. The controller processes input signals and estimated states to produce control signals, which are then used by the audio system to generate a rendered audio stream. This innovation also includes a loudspeaker protection system that clamps the input to the loudspeaker based on a bank of representative models.
Career Highlights
Throughout his career, Lindahl has worked with prominent companies such as Cirrus Logic Inc. and Actiwave AB. His experience in these organizations has allowed him to refine his skills and contribute to groundbreaking advancements in audio technology.
Collaborations
Lindahl has collaborated with notable individuals in the field, including Pär Gunnars Risberg and Ylva Ellen Maria Bjork. These collaborations have further enriched his work and expanded the scope of his innovations.
Conclusion
Erik Vilhelm Lindahl's contributions to audio technology through his patents and collaborations highlight his role as a significant inventor in the industry. His innovative approaches to loudspeaker technology continue to influence the field and pave the way for future advancements.