Recently, many customers have inquiredNoise spectrum analyzerWhat is the difference between it and a typical sound level meter,Accurately grasping the core differences between two acoustic measurement devices! The core difference between the two isDifferent measurement dimensionsSound level meters focus on comprehensive measurement of "overall sound pressure level", while spectrum analyzers focus on refined analysis of "frequency decomposition". The former is an "overview tool", while the latter is a "depth analysis tool".
Sound level meter (basic model)The core is to measure the "total sound pressure level" of sound, and output a single comprehensive value (in dB (A)) based on standard weighting (such as A weighting, C weighting).
Noise spectrum analyzerOn the basis of the sound level meter, the "frequency decomposition" function is added, which can segment the noise by frequency (such as 1/1 octave band, 1/3 octave band), output the sound pressure level of each frequency band, and generate a spectrogram.
Data output formatThe sound level meter only displays comprehensive values such as total sound level and equivalent continuous sound level (Leq); The spectrum analyzer can display the values of various frequency bands (such as dB values of 63Hz, 125Hz, 250Hz, etc.) and spectrum curves.
hardware requirementsThe spectrum analyzer needs to be equipped with an FFT (Fast Fourier Transform) module, a higher precision sampling circuit, and some support real-time spectrum analysis; The hardware structure of the sound level meter is simple, focusing on signal calibration and weighted filtering.
frequency rangeThe frequency range of ordinary sound level meters is mostly 20Hz-20kHz; The spectrum analyzer can cover a wider range (such as 1Hz-20kHz and above), and the frequency band division is more precise.
sound level meterSuitable for compliance testing (such as factory noise compliance testing, environmental noise monitoring), daily rapid screening, only need to determine whether the overall noise exceeds the standard scenario.
spectrum analyzerSuitable for sound source recognition (such as equipment noise localization), fault diagnosis (such as motor noise frequency band analysis), acoustic design (such as speaker frequency response debugging), and scenarios where it is necessary to know "which frequency component the noise comes from".
