Working with an already-good signal to noise ratio is definitely recommended. But, using reasonably long sweeps, the ESS method allows for increasing the S/N ratio up to +90 dB !!!This means that, in some circumstances, you can operate with a sweep signal which is WEAKER than the background noise, even 20 dB below it, so … Leggi tutto S/N, Long Sweeps and furnaces of power plants,
The plan of my foot corresponds with a rectangle. Can i say that all the shoes that will enter this rectangle will be conformable for me to wear? As regards the strategies on the design of audio systems the current trend seems to be to define the choice of the right speaker in terms of … Leggi tutto Is a Rectangle a Room?
Dear followers of the Blog. I recently did a series of webinars on the subject of STI. https://youtu.be/GI79KZPRERg I am really happy to host in this blog, an interesting article by Ray A. Rayburn, one of the columns of professional audio that support my training path. I asked Ray to tell us the story of … Leggi tutto “Mr. Blockhead & STI” an article by Ray Rayburn
https://youtu.be/GI79KZPRERg Vorrei riportare in questo articolo, il metodo dell uso del plugin STi del pacchetto Aurora Plugins, descritto nel mio ultimo webina sullo STI, che qui ho linkato. Per tutta la teoria, rimando ai contenuti del webinar. Aurora Plugin "STI & Octave Band Analysis v 4.4", è uno dei plugin del pacchetto Aurora del professor … Leggi tutto Aurora Plugin “STI & Octave Band Analysis v 4.4” Integration on my webinar: Intelligibility in Sound Reinforcement. STI: Speech Transmission Index – Part 1
On June 15, 2020, in full pandemic, I had the honor and pleasure of hosting David Griesinger for an interesting webinar:"The physics of auditory proximity and its effects on intelligibility and recall".Finally the webinar recording is online, on my Youtube channel, including the audio files used as test in the presentation (use headphones).The webinar was … Leggi tutto David Griesinger in: “The physics of auditory proximity and its effects on intelligibility and recall”
Fundamental concepts and terminologies around the idea of TIME. I have already written a note on my social pages and on my Blog, on some concepts concerning Time and Synchronization of Signals. I add this article (©SynAudCon), originally produced by Don Davis, on some concepts concerning the definitions of Time, Phase, Polarity, Group Delay, etc, … Leggi tutto “Definition of Terms or What is Time?” by Don Davis
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
Analyzers, Lin vs Log, HumansHumans frequency resolution is better at LF than at HF. You can easily hear a 1 Hz pitch change at 100Hz, but not at 5kHz. Our auditory system gives equal "spectral weight" to the 10kHz octave band (that contains thousands of frequencies) asit does the 20Hz octave band (that contains only … Leggi tutto Analyzers, Lin vs Log, Humans
Just 3 days ago, Ray announced his hospitalization due to covid. A sad news shakes me today, just as it shakes all my friends, young and old in the professional audio sector.I was lucky enough to get to know his work and appreciate it.I had the honor of his interventions and articles on my blog. … Leggi tutto R.I.P. MASTER Ray A Rayburn. Because of the damn COVID, he leaves us a column of Professional Audio
WEBINAR: "Acoustical Parameters ISO3382 for Sound System Design" (recording) On January 7, 2021, I held a webinar on acoustic parameters. On that occasion, unfortunately, a technical problem interrupted the Live Stream on FaceBook via Zoom. I therefore re-recorded the entire webinar, trying to respect the contents of the live one. Unfortunately, the participation of the … Leggi tutto WEBINAR: “Acoustical Parameters ISO3382 for Sound System Design” (recording)
I report here what I learned from Professor Farina on the topic of Amplitude Scaling of the impulse response. A passage often underestimated in its importance. Making an Impulse Response measurement, we should pay attention to its correct Amplitude Scaling. Ideally, we can define the impulse response as the response of a system when stimulated … Leggi tutto A correct Amplitude Scaling of Impulse Response
Here the link of the video recording: https://youtu.be/qadleoZCZ6Y
The market choices of recent decades, which are reflected in some modern fft analyzer softwares, have meant that our gaze at the sound phenomenon and the complexity of reality was limited to a Transfer Fuction screen.This in some softwares is reflected in little attention and care towards the IR, relegated to a secondary activity, with … Leggi tutto Starting from Impulse Response. A serie of webinars on the importance of the gathering and processing of the Room Impulse Response.
Una breve descrizione delle Tecniche "leggere" di gathering di Room Impulse Response on the field. Durante misure acustiche nella Chiesa San Vincenzo de Paoli nel Borgo La Martella, Matera (ITA), uno dei ragazzi presenti al workshop pone una domanda alla quale decido di rispondere con quest breve ed improvvisato video. https://youtu.be/YoAo_g73xC4
Ovvero del tuning di sistemi sonori sul campo con musica come segnale di test e in presenza delle variabili acustiche della sala e transitorie del pubblico. Oggi giorno il mercato dei comuni FFT Analyer usati nel live tuning, dà molta enfasi al fatto che essi, potendo realizzare misure c.d. a "doppio canale", possono utilizzare come … Leggi tutto GI.GO: ovvero della dura legge del “Garbage IN / Garbage Out” nel Tuning con il tuo FFT ANALYZER
I highly recommend reading the previous articles in which I illustrated the Hopkins-Stryker formulas. Remembering this formula, to modify LD it is necessary to modify two fundamental variables: LW (sound power level) and Q (Directivity Factor). When to change one or the other? Let's start with the two extreme cases. If delta dB = 0 … Leggi tutto Will I change Q or Lw to control LD?
Acoustic measurements are but one way to evaluate the dissipation of energy in an enclosed space. An example from everyday life is in order. We shall consider something that everyone reading this will have in common, your body weight. How can you tell if it is increasing or decreasing? There are several possibilities, but the … Leggi tutto Can meters tell you what something sounds like?
Heyser, among other things, was the inventor of Time Delay Spectrometry. He was one of the most productive and revolutionary scientists of the last century. Heyser taught courses for SynAudCon, a world leader in professional audio engineering and acoustics training since the 1960s. The contents of the courses were of the highest level and reserved, … Leggi tutto What could you learn in a course with Richard Heyser in 1979?
