Real Time Analyzer

Real Time Analyzer

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 rackmounted 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.


There 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. [ [ True Audio FAQ] ] Digital signal processing is more cost effective.

Professional Use

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.

ee also

*Architectural acoustics
*Real-time computing
*Spectrum analyzer
*Pink noise
*Auditory scene analysis incl. 3D-sound perception, localisation
*audio processing
*sound localization
*source separation

Wikimedia Foundation. 2010.

Look at other dictionaries:

  • Real Time — Real|time, die; , Real Time, die; [ ri:əlta̮im , ta̮im; engl. real time = Echtzeit, aus: real = wirklich, real u. time = Zeit] (EDV): für die sofortige u. unmittelbare Verarbeitung der Daten tatsächlich benötigte Zeit einer elektronischen… …   Universal-Lexikon

  • Analyzer —   [englisch, ænəlaɪzə; wörtlich »Analysator«], auch Echtzeitanalysator, Real Time Analyzer. Der Analyzer ist ein »Klangbeobachtungsgerät«. Er zeigt auf einem Bildschirm oder Leuchtdiodenfeld an, wie hoch die Pegelanteile einzelner Frequenzbänder… …   Universal-Lexikon

  • Time-of-flight mass spectrometry — (TOFMS) is a method of mass spectrometry in which ions are accelerated by an electric field of known strength. [Stephens, W. E., [ A Pulsed Mass Spectrometer with Time Dispersion] Phys. Rev. , 1946, 69 …   Wikipedia

  • Spectrum analyzer — A spectrum analyzer Spectrum analyzer display A spectrum analyzer measures the magnitude of an input signal versus frequency with …   Wikipedia

  • Network analyzer (electrical) — Not to be confused with packet analyzer or telecom network protocol analyzer. ZVA40 vector network analyser from Rohde Schwarz. A network analyzer is an instrument that measures the network parameters of electrical networks. Today, network… …   Wikipedia

  • Digital differential analyzer — This article is about the digital implementation of a Differential Analyzer. For other uses of DDA, see DDA. For the graphics algorithm, see Digital Differential Analyzer (graphics algorithm). A digital differential analyzer (DDA), also sometimes …   Wikipedia

  • Digital Differential Analyzer — A Digital Differential Analyzer (DDA), also sometimes called a Digital Integrating Computer [cite book last = Mayorov first = F. V. authorlink = coauthors = title = ELECTRONIC DIGITAL INTEGRATING COMPUTERS Digital Differential Analyzers publisher …   Wikipedia

  • Coal analyzer — Coal analyzers are used by coal producers, coal preparation plants and coal fired power plants to determine coal quality in real time. Coal quality parameters of greatest interest include ash, moisture, sulfur, and energy value (also known as… …   Wikipedia

  • Discrete-time Fourier transform — In mathematics, the discrete time Fourier transform (DTFT) is one of the specific forms of Fourier analysis. As such, it transforms one function into another, which is called the frequency domain representation, or simply the DTFT , of the… …   Wikipedia

  • Sound reinforcement system — A sound reinforcement system is an arrangement of microphones, electronic signal processors, amplifiers, and loudspeakers that makes live or pre recorded sounds usually music or speech louder, or that distributes the sound to a larger or more… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.