Sound Spectrum Pro vs Decibel X PRO: Sound Meter Usage & Stats

RTA (Real-Time Analyzer), FFT (amplitude display driven by Fast Fourier Transform), calibration, signal generators... Everything is included, bundled in a friendly interface with many on-screen controls and smooth real-time display. == Features == + FFT (amplitude) and RTA (octave, 1/3 octave, ... down to 1/24 octave). + Sound pressure level dBA, dBC, and dBZ. + Noise Criterion and Noise Rating in octave RTA. + Equivalent continuous sound level LAeq, LCeq, LZeq, LAeq15, LAeq60. + Impulse response and RT60 measurement. + Large font SPL + LEQ meter. + THD+N Total Harmonic Distortion plus Noise + Lightning-fast FFT with size from 16k to 1M, providing frequency resolution of 0.05Hz directly and 0.01Hz with downsampling. + Sample rate of 48kHz, if supported by the device. + Many window functions to choose from. + Logarithmic or linear frequency axis. + Peak and valley hold with adjustable decay. + Highest peak display + Adjustable exponential smoothing. + Easy pan (drag) and zoom (pinch). + Measurement cursors, also used for setting frequency of signal generators. + File load/save and full calibration capability, for accurate SPL readings. + Signal generators: tone, white noise, white sweep, pink noise, pink sweep, pink octave, pink 1/3 octave. + Synchronous measurement mode (including frequency sweep) for clean and fast spectrum analysis. + Loopback mode to try out signal generators and window functions. + Sharing and printing of screenshots. + No ads!

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Decibel X PRO: Sound Meter

"Decibel X PRO" is one of very few sound meter apps on the market that has highly reliable, pre-calibrated measurements and supports frequency weightings: ITU-R 468, A and C. It turns your phone device into a professional noise meter, precisely measures the sound pressure level (SPL) all around you. This extremely useful and beautiful tool will not only be an essential gadget for many uses but also bring you a lot of fun. Have you wondered how quiet is your room or how loud is a rock concert or sport event? "Decibel X PRO" will help you answer all of those. WHAT MAKES "DECIBEL X PRO" SPECIAL: - Trusted accuracy: the app is carefully tested and calibrated for most devices. The precision is matching with real SPL devices - Frequency weighting filters: ITU-R 468, A, B, C, Z - Spectrum analyzer: FFT and BAR graphs to display real time FFT. Those are very useful for frequency analysis and musical tests. Real time predominant frequency is also displayed. - Powerful, smart history data management: + Recording data can be saved into a list of history records for future access and analysis + Each record can be exported as hi-res PNG graph or CSV text via sharing services + Fullscreen mode to give overview the whole history of an record - Dosimeter: NIOSH, OSHA standards - InstaDecibel to capture your dB report overlaid on photos and easily shared via popular social networks (Facebook, Instagram, etc.). - Support both Portrait and Landscape layouts - Beautiful, intuitive and carefully crafted UI design OTHER FEATURES: - Standard time weightings (Response Time): SLOW (500 milliseconds) and FAST (200 milliseconds) - Trimming calibration from -15 dB to 15 dB - Standard measurement range from 30 dBA up to 130 dBA - HISTO graph for plotted history of the recorded values - WAVE graph with 2 display modes: Rolling & Buffer - Real time scale level chart - Display Current, Average/Leq, and Max values with both nice and clear digital and analog layouts - Quick reference text to help you compare with real-life examples - "Keep Device Stay Awake" option for long duration recording - Reset and clear current recording at any time - Pause/Resume at any time NOTES: - Please do not expect a quiet room reading will be 0 dBA. The range 30 dBA - 130 dBA is the standard usable range and an average quiet room will be about 30 dBA. - Although most devices are pre-calibrated, custom calibration is suggested for serious purposes requiring higher precision and accuracy. To calibrate, you will need a real external device or calibrated sound meter as a reference, then adjust the trimming value until the reading matches with the reference. If you like it or have suggestions, please support us by rating and giving us comments and feedback.