Smaart 7 requires signal generator to be running generator#
The Talkbox acoustic signal generator with built-in loudspeaker is designed for this application. Requirements for such a loudspeaker are defined in the IEC 60268-16 standard, which states that the typical level of a human talker corresponds to 60 dBA 1 m distance.įurthermore, the ITU-T P.51 standard defines an appropriate loudspeaker to be one where the radiation characteristic corresponds broadly to that of a human mouth. Select the file you want to use and specify the output level.In locations such as classrooms, where no PA system is installed, the STIPA test signal should be reproduced by an appropriate loudspeaker at the position and with the typical sound pressure level of the speaker (the teacher). When using file-based signals you just need to In addition to internally generated signals, Smaart also enables you to use any.wav or AIFF file as a test signal. There's also a master output levelĬontrol that sets the overall output level. The frequency and output level of each sine wave are independently selectable. Read 3 dB higher then when Show RMS is selected. When Show Peak is selected for a sine wave signal a given signal level will Sine waves and dual sine waves, you can opt to show the output levels as peak or RMS. Technically it is pseudorandom noise as well, however since this generator is randomly seeded every time you run itĪnd once started, it has a cycle length of many billions of years, we feel it is extremely unlikely that it will ever produce exactly the same sequence of samples more Random noise in Smaart 7 is generated on-the-fly. When Random noise is selected the only options you need to set are the output level and whether you prefer to specify level as a Peak or RMS value. The Cycle selector specifies the repeat interval for the noise sequence in samples. Checking the Band Limited checkbox activates the Start Freq and Stop Freq controls enabling you to specify startĪnd stop frequencies for your desired passband. Read 12 dB the higher than when Show RMS is selected. When Show Peak is selected, a given signal level will The program will not attempt to set it for you.įor both random and pseudorandom pink noise you can elect to show the output levels as RMS or peak levels. In Smaart 7, because there can be multiple FFT sizes in use at any given time, you mustĮxplicitly choose the cycle length you wish to use. In previous versions of Smaart we referred to pseudorandom noise as sync noiseīecause the cycle length was automatically set to match the FFT size in use. Pseudorandom cycle lengths are available to match all the FFT sizes offered in Smaart. Pseudorandom noise repeats on intervals that are a power of two samples in length and can be band-limited. Options for pink noise include Random and Pseudorandom. The configuration options for the signal generator differ somewhat depending on the type of signal currently selected. The Smaart 7 signal generator supports for basic signal types random and pseudorandom pink noise, single and dual sine waves and file-based data from The signal generator configuration dialog is accessible by clicking on the signal generator readout field in both Real Time and Impulse Response mode. Configuration des Options du Programme > Générateur de Signal