Abstract
A physical structure such as a cylindrical pipe controls the propagated sound spectrum in a predictable way that can be used to localize the sound source. This paper designs a monaural sound localization system based on multiple pyramidal horns around a single microphone. The acoustic resonance within the horn provides a periodicity in the spectral domain known as the fundamental frequency which is inversely proportional to the radial horn length. Once the system accurately estimates the fundamental frequency, the horn length and corresponding angle can be derived by the relationship. The modified Cepstrum algorithm is employed to evaluate the fundamental frequency. In an anechoic chamber, localization experiments over azimuthal configuration show that up to 61% of the proper signal is recognized correctly with 30% misfire. With a speculated detection threshold, the system estimates direction 52% in positive-to-positive and 34% in negative-to-positive decision rate, on average.
Highlights
The human auditory system offers significantly accurate acoustic imaging compared to a conventional dual-sensor localization system
This paper proposes a novel monaural sound localization system based on the spectral cues derived from the unique structure
Prior to executing the performance analysis on the designed monaural localization (ML) system, further experimentation is required in order to determine the relationship between the fundamental frequency and ML structure direction
Summary
The human auditory system offers significantly accurate acoustic imaging compared to a conventional dual-sensor localization system. The localization blur, which represents the smallest change in direction to produce an auditory event, is less than ±10°. A moving sound source in the median plane can be recognized with a localization blur not exceeding ±22° [1]. The notable feature of the human localization function is the spectral cue inserted by the pinna structure. The localization in the median plane is mainly achieved by the perception of the spectral cue over the propagated sound. The symmetric distribution of the aural architecture plays a significant role in the horizontal localization; the height variation in median plane cannot be detected without the irregular shape of the pinna
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
