Corsair H90 review -
Noise levels - Sound pressure readings
With a certified dBA meter we measure how many dBAs originate from the PC. It's slightly subjective as there is always noise in the background, from the streets, from the HD, PSU fan, etc so this is by a mile or two not a precise measurement. You could only achieve objective measurement in a sound test chamber. Take this measurement as an indication, not a precise measurement please.
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 1kHz and above 6kHz are attenuated, whereas frequencies between 1kHz and 6kHz are amplified by the A weighting.
|TYPICAL SOUND LEVELS|
|Jet takeoff (200 feet)||120 dBA|
|Construction Site||110 dBA||Intolerable|
|Shout (5 feet)||100 dBA|
|Heavy truck (50 feet)||90 dBA||Very noisy|
|Urban street||80 dBA|
|Automobile interior||70 dBA||Noisy|
|Normal conversation (3 feet)||60 dBA|
|Office, classroom||50 dBA||Moderate|
|Living room||40 dBA|
|Bedroom at night||30 dBA||Quiet|
|Broadcast studio||20 dBA|
|Rustling leaves||10 dBA||Barely audible|
But let's have a peek at noise levels. We take a dBA gun and point it at the working PC from a distance of 75cm.
So explaining sound is always difficult, but up-to 40 DBa is considered to be silent. Once you are in the 41~43 DBa range you can hear the product and after 43~44 DBa the product can be considered to be a noisy cooler.
We now put the processor under 100% load again with the processor under full load for a full Prime95 run. Noise pressure is a difficult thing to explain alright.
So if you want silence then up-to 39~40 DBa is your baseline threshold. The Corsair H90 manages to to remain a very silent cooler.
We review the Corsair Vengeance K95 mechanical keyboard with cherry red switches. The K95 is the flagship successor in the popular Vengeance keyboard series and while it uses the same basis and conc...
Corsair Carbide 330R review
We review and test the Corsair Carbide 330R, also known as hero. The new model is aimed at a more audiophile tense segment as it has sound dampening materials all over the place.
Corsair Force LS 240GB SSD Review
Corsair has released the Force LS series SSD, and we review it. This is the arrival of the new 19nm Toggle NAND based LS series for consumers is aimed to be a more affordable product series within Corsair's extensive SSD range. And though not the fastest kid on the block it definitely knows how to impress. Let's check out the review.
Corsair Obsidian 750D review
We test and review the all new Corsair Obsidian 750D chassis. The chassis is of course based of its bigger brother the 900D which was recently released and embraced by the PC enthusiast community.