A real-time analyzer (RTA) is a professional audio device that measures and displays the frequency spectrum of an audio signal; a spectrum analyzer that works in real time. An RTA can range from a small PDA-sized device to a rack-mounted hardware unit to software running on a laptop. It works by measuring and displaying sound input, often from an integrated microphone or with a signal from a PA system. Basic RTAs show three measurements per octave at 3 or 6 dB increments; sophisticated software solutions can show 24 or more measurements per octave as well as 0.1 dB resolution.
Rane RA 27 hardware real-time analyzer underneath an Ashly Protea II 4.24C speaker processor (with RS-232 connection)
The main difference between the two types is that the analog RTAs use a series of hardwired, analog bandpass filters to break the signal into frequency bands prior to measuring it. Digital RTAs use digital sampling technology and microprocessor-based digital signal processing to perform necessary calculations, such as fast Fourier transforms, to perform the measurements and thus do not need analog hardware filters to isolate each frequency band. The digital approach to signal analysis generally yields much higher accuracy and resolution and thus most RTAs currently in production use digital signal processing technology.[1] Digital signal processing is more cost effective.
Professional useEdit
RTAs are often used by sound engineers and by acousticians installing audio systems in all kinds of listening spaces: Venues, home theatres, cars etc. The parameters that can be measured are the spectral aspects of sound reproduction caused by effects like resonances and constructive and destructive interference, but not imaging and spatial aspects. In professional audio many systems incorporate an RTA along with a device that also performs equalization. While measuring pink noise or other test tones, such a controller can level out the frequency response by employing a set of adjustments in the appropriate frequency areas according to the system's interaction with the venue's size, shape and construction materials, among other things.
real, time, analyzer, real, time, analysis, analytics, this, article, needs, additional, citations, verification, please, help, improve, this, article, adding, citations, reliable, sources, unsourced, material, challenged, removed, find, sources, news, newspap. For real time web analysis see Web analytics This article needs additional citations for verification Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources Real time analyzer news newspapers books scholar JSTOR November 2009 Learn how and when to remove this template message A real time analyzer RTA is a professional audio device that measures and displays the frequency spectrum of an audio signal a spectrum analyzer that works in real time An RTA can range from a small PDA sized device to a rack mounted hardware unit to software running on a laptop It works by measuring and displaying sound input often from an integrated microphone or with a signal from a PA system Basic RTAs show three measurements per octave at 3 or 6 dB increments sophisticated software solutions can show 24 or more measurements per octave as well as 0 1 dB resolution Rane RA 27 hardware real time analyzer underneath an Ashly Protea II 4 24C speaker processor with RS 232 connection Contents 1 Types 1 1 Professional use 2 See also 3 ReferencesTypes EditThere are generally two types of RTAs RTAs employing analog signal processing and RTAs employing digital signal processing DSP The main difference between the two types is that the analog RTAs use a series of hardwired analog bandpass filters to break the signal into frequency bands prior to measuring it Digital RTAs use digital sampling technology and microprocessor based digital signal processing to perform necessary calculations such as fast Fourier transforms to perform the measurements and thus do not need analog hardware filters to isolate each frequency band The digital approach to signal analysis generally yields much higher accuracy and resolution and thus most RTAs currently in production use digital signal processing technology 1 Digital signal processing is more cost effective Professional use Edit RTAs are often used by sound engineers and by acousticians installing audio systems in all kinds of listening spaces Venues home theatres cars etc The parameters that can be measured are the spectral aspects of sound reproduction caused by effects like resonances and constructive and destructive interference but not imaging and spatial aspects In professional audio many systems incorporate an RTA along with a device that also performs equalization While measuring pink noise or other test tones such a controller can level out the frequency response by employing a set of adjustments in the appropriate frequency areas according to the system s interaction with the venue s size shape and construction materials among other things See also EditArchitectural acoustics Audio signal processing Auditory scene analysis incl 3D sound perception localization Real time computing Signal separation Sound localization Spectrum analyzer TimbreReferences Edit True Audio FAQ Retrieved from https en wikipedia org w index php title Real time analyzer amp oldid 1171887724, wikipedia, wiki, book, books, library,
