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
This article was writed by Pat Browm, today at the guide of SynAudCon with his wife Brenda, in 1994. I happy to report you today. "One of the greatest benefits of modem test equipment is the ability that it gives us to calibrate our ear/brain system.By calibrate, we mean that the audible characteristics of various … Leggi tutto “Use Your Ears” by Pat Brown 1994
Rest in Peace Engene Patronis Sad news. The world of professional Audio and Science lose they lose one of their protagonists. My personal hought to his family and to the many colleagues of the SynAudCon family, who in the past 50 years have had Patronis as a mentor and fundamental pillar. Fedele Here are the … Leggi tutto Rest in Peace Engene Patronis
In 1979, Don Davis remembers Manfred Schroeder and tells about him: "Several years ago we reviewed "Auditorium Acoustics" (ed by Robin MacKinzie, published by Applied Science Publishers Ltd, 1975). At that time we completely overlooked the fact that Manfred R. Schroeder work on two channel surround sound and of equal importance his work on diffusion … Leggi tutto “Manfred Schroeder is not a man to trifled with”, Don Davis
The great story of SAC is made by Don and Carolyn for sure, but also by Giants like Hyser, Peutz, D'Antonio and others. But it is also made up of many great protagonists, inspired peoples who have been active members of this Family. I want to start by quoting Dave Andrews, because I really liked … Leggi tutto SynAudCon Stories – Synergetic People: Dave Andrews “Beard Meets Beast”,
From "If Bad Sound Were Fatal, Audio Would Be The Leading Cause Of Death Copertina flessibile" i Don Davis & Carolyn Davis "Three quite different careers have beckoned me during my years on this fascinating planet and left me with a three-way split in the material things that have helped shape my thinking. AUDIO Audio … Leggi tutto Audio, High Speed Driving, Firearms and Shooting. The three souls of Don Davis
SynAudCon Stories ( (I will tell you this fascinating Story in which I am immersed and which has lasted for 50 years) 1992 - During a class on the Farm (for all - the historic SAC course venue in US, which also housed the family and the things the Davis liked), VIP guests spend time … Leggi tutto SynAudCon Stories – Audio and Guns
The Room and the Doctor - The role of RT in small rooms. You can measure it, you can give it a number, you can get a general feel for the "liveness" of the room from the number, but that's about it. We have much better tools and metrics for dealing with small rooms than … Leggi tutto The Room and the Doctor – The role of RT in small rooms.
There are few instrumental displays in physical science more intuitively beautiful than the four-fold display of the analytic signal.The complexity of energy accounting frequency-byfrequency for a given point in space unfolds visually with each mathematical perspective shown as a shadow image of the three dimensional whole. The genius of Harry Nyquist and the brilliance of … Leggi tutto The Analytic Signal
1985Hellmuth Kolbe (with is TEF Analyzer), Norbert Sobol (Product Manager of AKG Acoustics), Don Davis making measurements in the Musikverienssaal in Vienna, a concert Hall of 1680 seats (in 1985) with a conventionally measured (level recorder) RT60 = 2.05 secs at 1000 Hz.In Beranek's increasingly priceless book "Music, Acoustics, and Architecture" , a majority of … Leggi tutto 1985: Musikverienssaal Concert Hall and the acoustic properties of “topless ladies”
I report this consideration of a respectable FB friend of mine, read elsewhere. In fact, educating is less productive for the market."I am seeing more and more rooms that are being pressed into service as either critical listening spaces or conferencing spaces even though they are not remotely suitable for the job. This might be … Leggi tutto The Architects. A thought of Bill Thompson
Spesso poni il tuo microfono omnidirezionale in un punto ed equalizzi guardando ad uno schermo e dimenticando ( tra l altro) che la tua testa non è omnidirezionale.Non siamo ne omnidirezionali, ne a direzionalita' costante"If you're going to EQ (for the purpose of listening) the combination of direct sound and reflected sounds coming from other … Leggi tutto Humans listen not omnidirectional. A thought of Dale Shirk
"Too much reflected energy from the walls near a stage causes muddiness, and prompts human neurology to impart the sensation of acoustic distance.This is common in smaller venues that have inadequate volume to create adequate reverberation time. The only other way to increasereverberation time is to alter architectural treatments to decreaseabsorption. This, however, increases the … Leggi tutto Psycoacoustic and Time Domain are important, when you design or modify the acoustics of your hall. A thought of Steve Barbar
"Most loudspeaker specifications are frequency dependent. They are often displayed on two-dimensional plots with frequency as the independent variable. Such plots can be misleading for some specifications. A good example is the plot of beamwidth vs. frequency. Figure 1 shows this plot for the vertical radiation of a popular loudspeaker. Note the discontinuity at 500Hz. … Leggi tutto “The Bigger Picture” by Pat Brown
Immaginiamo una stanza chiusa, senza aperture. Essa avrà un Volume V. Più è grande il Volume della stanza è più energia dobbiamo immettere per colmarla. Immaginiamo ora di praticare una apertura in una parete. L'energia accumulata nella stanza, impiegherà del tempo per fuoriscire dalla stessa. Abbiamo pertanto, in linea generale e concettuale: T (Tempo) è … Leggi tutto Arriviamo alla formula di Sabine con il Ragionamento
1992. Peter D'Antonio parlando del suo amico Manfred Schroeder, riguardo un suo talk per AES NY, basato sul sul suo libro "Fractals, Chaos, Power Laws: Minutes from an Infinite Paradise": "He explained how his life has envolved from a prominent physicist to a writer to his present embodiment of an artist. After wowing us with … Leggi tutto Peter D’Antonio & Manfred Schroeder.
La forma semplice dell'equazione di Peutz per il %Alcons può essere definita "architetturale", poiché contiene termini architetturali. Essa è passata nel dimenticatoio per il sopraggiungere dei moderni software e del parametro STI, ma rimane tutt'ora uno strumento valido e molto efficace nella valutazione degli spazi sabiniani, ovvero quegli spazi in uni la formula di Sabine … Leggi tutto Le Equazioni dell’Acustica Statistica dimenticate. Quando usare la versione semplificata di %ALcons
I principi basilari dell’uso di ALL PASS Filters nel tuning, vengono da lontano: https://illatooscurodellafase.wordpress.com/2019/02/28/tuning-phase-metodo-di-john-murray/ Ho scritto vari articoli e pubblicato vari webinars sul tema. A titolo di esempio: https://illatooscurodellafase.wordpress.com/2018/01/06/all-pass-filter-usi-pratici-nel-tuning-dei-sistemi-di-rinforzo-sonoro/ Il mercato, si sa, è sempre in cerca di nuovi spiragli che possano far circolare nuova linfa nelle vendite. E così l’uso degli APF nel … Leggi tutto Controindicazioni della tecnica “APF LM BEAM SPREAD/STEERING”
Il Lato Oscuro della Fase 