Riprendo questa nota che scrissi sulla mia pagina Facebook nell'Ottobre del 2015. La teoria vuole il subwoofer, ovvero il protagonista della nostra storia, una sorgente omnidirezionale. Il range operativo di un subwoofer generalmente varia dai 25 Hz ai 125 Hz (o giù di li). Parliamo di un range operativo di frequenze che abbraccia lunghezze d'onda … Leggi tutto Sull’utilità dell’appendimento dei subwoofers, della direttività in bassa frequenza e di Jovanotti…
Meyer Sound e le menti che in essa ed intorno ad essa lavorano, hanno fatto la storia delle moderne tecniche per il disegno e tuning dei sistemi di rinforzo sonoro. La continua lotta tra teoria, softwares e realtà, è il tema portante di questo blog come ho più volte precisato e Meyer Sound è, a … Leggi tutto Del MAPP XT tra Softwares e Realtà; dell’importanza dei “preliminari” (VERIFICA) e di alcune storie di MSL-4…
"Scendiamo dunque e confondiamo la loro lingua, perché non comprendano più l'uno la lingua dell'altro" (Gen. 11, 1-9) (Episodio della confusione delle lingue - Torre di Babele) In questi ultimi 15 anni si è assistito ad un vero e proprio exploit dell' interesse verso l’uso di configurazioni di subwoofers cosidette “cardiodi”. Non c’è un concerto, … Leggi tutto Per una corretta e condivisa nomenclatura degli arrays direttivi di subwoofers
Da alcuni anni sì è diffusa nel mondo degli utilizzatori di alcuni grandi marchi di audio professionale, uno strano fenomeno. E' facile rendersi conto che siamo di fronte ad un altro esempio di scollamento tra realtà e manuali. Sui manuali di questi marchi, a titolo meramente esemplificativo, sono illustrate delle configurazioni di subwoofers denominate genericamente … Leggi tutto Delle configurazioni “cardioidi” asimmetriche di subwoofers, dei manuali, dei sotwares e del senso critico
For the many friends who were unable to follow the webinar, here is the full video recording. Thanks to the many friends who took the time to participate. Practical Subwoofers Arrays case studies in the same location: - level tapering and coverage adaptation - side effects of lines and arcs - gradient mixed end-fire … Leggi tutto A my webinar for Bose Professional: Arena Cava del Sole Case Studies (Bass array)
Smaart V8 Beta. Overlay and simultaneous display of three room impulse response recordings obtained in Church of Santi Luca and Martina with a Soundfield Mk-V microphone. The B-format flux is obtained from A-format recordings. Source used: Dodec In the previous immage, the Binaural IR (B-Format) is showed. The RIR was measured in a Baroque church … Leggi tutto Comparison of B – format room impulse response ambisonics recordings in Smaart V8 Beta.
Many time ago i received the SynAudCon Sound System Calculator directly from Pat Brown. You can imagine what it means to me. Today the paper calculator has been supplanted by electronic versions and by the use of softwares, but using it still gives me great emotion today. Indeed very often, for quick calculations, i refuse … Leggi tutto Using the historical Sound System Calculator by SynAudCon: Example 1 Room Absorption
Recently the topic of "Multi Time - Something” (that means the variety of terminology that I have seen use: "multi time record", “multi time windows”, "multi analysis windows, etc) has come back to attention. I will not dwell on the apparent terminological confusion that I have read around and which involves the terms of "time records", … Leggi tutto Some personal consideration around the topic “Multi Time – “Something” ”
https://youtu.be/ofsh3FhMshY It has been an honor and a privilege for me to host, within my series of educational webinars on acoustic and sound system design themes, the contributions of exceptional guests such as Charlie Hughes, Dr Adam Hill, Jason romney, Leonard Moskowitz, and others that i will reveal in the coming days. Thanks Jason … Leggi tutto VIDEO RECORDING WEBINAR: “Haas Effect in Theatre Design”. Fedele De Marco introducing Jason Romney
https://youtu.be/hd4jTLJa-Cs It has been an honor and a privilege for me to host, within my series of educational webinars on acoustic and sound system design themes, the contributions of exceptional guests such as Charlie Hughes, Dr Adam Hill, Jason romney, Leonard Moskowitz, and others that i will reveal in the coming days. A … Leggi tutto VIDEO RECORDING WEBINAR “Subwoofers & Full-Range Alignment in TIme Domain”, Charlie Hughes and Fedele De Marco
https://youtu.be/a-9mPc6YC-U It has been an honor and a privilege for me to host, within my series of educational webinars on acoustic and sound system design themes, the contributions of exceptional guests such as Charlie Hughes, Dr Adam Hill, Jason romney, Leonard Moskowitz, and others that i will reveal in the coming days. Thanks to … Leggi tutto VIDEO RECORDING WEBINAR: “Audio signal decorrelation for live sound”, by Dr. Adam J. Hill. Educational webinars serie by Fedele De Marco
In a SynAudCon Class in Anaheim, in September 1979, FARREL BECKER, working with KEN WAHRENBROCK, proposed a corner version of PZM. Farrel's reasoning was that: "the PZM is not affected by the reflections from the surface it is mounted on. Therefore, if it is essentially mounted against 3 surfaces, as in a trihedral corner, it … Leggi tutto The “TRIHEDRAL PZM^3”and a good way to perform ground plane measuraments of loudspeakers
STI (STI, Speech Transmission Index) a Speech intelligibility index, is influenced (among other things) by the signal-to-noise ratio (S/N) (speech level over the background noise), the reverberation time (RT), the presence of late energy arrivals (strong reflections and Echoes). The STI parameter is defined in the IEC 60268-16 standard. The STI is described by a … Leggi tutto Small note: STI and Audience
In this way started the manual of Techron TEF System 20 (by Techron Division of Crown International, Inc,): "A man before his time - Heyser”, some have said, was the Newton of our age. Richard C. Heyser often quoted Einstein: "It is the theory which decides what we can observe." From the center of that … Leggi tutto “A man before his time – Heyser”
