Citiraj:
Autor kurc
Iako je jasno da nisu objektivni i da je to nevidija dobro podmazala, može biti da je 1080 ugodnija uhu radi frekvencije zvuka itd. 45 decibela grebanja po ploči nije isto što i 45 decibela puhanja vjetra, iako uređaj pokazuje 45dB.
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Definicija db(A):
"The human hearing system has different sensitivities at different frequencies. This means that the perception of noise is not at all equal at every frequency. Noise with significant measured levels (in dB) at high or low frequencies will not be as annoying as it would be when its energy is concentrated in the middle frequencies. In other words, the measured noise levels in dB will not reflect the actual human perception of the loudness of the noise. That's why we measure the dBA level. A specific circuit is added to the sound level meter to correct its reading in regard to this concept. This reading is the noise level in dBA. The letter A is added to indicate the correction that was made in the measurement. Frequencies below 1 kHz and above 6 kHz are attenuated, whereas frequencies between 1 kHz and 6 kHz are amplified by the A weighting."
290x:
Quiet Mode (Default)
| 33.4 dB(A)
| 45.2 dB(A)
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1080FE
noise rises to 46.8 dB(A).