![]() As far as space behind our Latvians goes, 0.5m minimum is advised. The manufacturer's suggestion is that the minimum distance to the listening seat be no less than 2.2m. It won't hide in a corner not only because of its peculiar looks but size. ![]() In other words, the Bespoke P15 is massive. Each speaker measures 80x130x35cm HxWxD and weighs 40kg. Sensitivity of 98/112dB (1W/1m) for LF/HF drivers seals the deal. Overall specs are as follows: 30Hz–20kHz bandwidth, 100Hz–20kHz +/-30° of acoustic phase response, max SPL of 105 and 127dB 30Hz and 60Hz–20kHz respectively. Its titanium diaphragm is coated with titanium nitride. Hence the mid and high frequencies are handled by a 3" compression driver. Reflector Audio describe this model as a 2-way baffle-free hornspeaker. This is what Roland Janevich's patented invention is all about. ![]() These angles also translate to increased forward radiation efficiency which yields higher controlled dispersion for better performance in problematic listening rooms. Their specific angles focus the sound radiation at 1.2m in the Bespoke P15's case and from that point on coherence is locked. He explained that the inversion came about to more closely approximate a single shared acoustical axis for all four drivers. Yes, their membranes fire at the front wall facing away from the listener. Its four 15" long-throw 18mm Xmax paper cone woofers align as a four-leaf'd clover and are inverted. Reflector's Bespoke P15 is different from typical open baffles not only because it sports no baffle at all. The downside? Since there's no pressure build-up in a resonant or sealed chamber, the woofers must be big. Nevertheless, the ISDAR-LIB combination performs well and has a run time 200 times faster than ETSAC.It's best to picture the Bespoke P15 as a quasi OB pushed further into a box-free direction. ETSAC generates errors lower than the alternative methods compared through our datasets. Finally, systematic experiments on simulated and measured RIRs are presented, comparing the proposed methods with the state-of-the-art. Fourth, we present a direct localization method, the ellipsoid tangent sample consensus (ETSAC), exploiting ellipsoid properties to localize the reflector. ![]() Third, two variants of it, exploiting multiple loudspeakers, are proposed. It is constructed by combining an image source locator (the image source direction and range (ISDAR) algorithm), and a reflector locator (using the loudspeaker-image bisection (LIB) algorithm). Second, we propose an image-source reversion method that uses the RIRs from a single loudspeaker. First, an onset detector, called the clustered dynamic programming projected phase-slope algorithm, is proposed to automatically extract the time of arrival for early reflections within the RIRs of a compact microphone array. In this article, we categorize these methods as "image-source reversion", which localizes the image source before finding the reflector position, and "direct localization", which localizes the reflector without intermediate steps. Several methods have recently been proposed to estimate the 3D positions of acoustic reflectors given room impulse responses (RIRs). Jackson and Philip Coleman and Wenwu Wang Download PDF Abstract:Acoustic reflector localization is an important issue in audio signal processing, with direct applications in spatial audio, scene reconstruction, and source separation. Download a PDF of the paper titled Acoustic Reflector Localization: Novel Image Source Reversion and Direct Localization Methods, by Luca Remaggi and Philip J.
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