What Type of Fans are used and how Loud are they?

Variable Speed Fan:

60x60x15mm, Input Power Supply Range: DC 4V to 12V ( USB port). Output range: DC 3V-8V ( USB port) , 2000-6500 RPM, Dual Ball bearing fan, IP65 rated.

Equipped with an included user-friendly controller, our variable fan offers a wide range of rpm options, ranging from a gentle 2200 rpm to an impressive 6500 rpm. While it is highly improbable that you will ever require speeds exceeding 5000 RPMs, we believe in providing you with the flexibility to adjust the output according to your preferences without compromising the electrical integrity of the fan. Embrace the power of choice and experience the perfect balance between cooling efficiency and noise reduction with our variable rpm fan.

The Fan Controller is NOT IP65 rated, so don’t get it wet.

Below approximately 2200 rpm, the fan will not spin. Do not operate below this area, as insufficient voltage is being provided to turn the fan.

Faster than approximately 6500 rpm, the fan will slow down. Don’t operate above this area. It is highly improbable that speeds exceeding 6500 rpm will be needed. The 5-volt input will not provide enough power for the fan above this setting, and you will hear the fan cutting out and slowing down.

Constant Speed Fan:

60x60x15mm, 5-volt DC USB plug, 5000 RPM, Dual Ball bearing fan, IP65 rated.

Prior fans were either 3500 or 5000 rpm dual ball-bearing fans.

STUDIO CAMCooLER models use a 12-volt Noctua NF-A6x25 PWM, Premium Quiet Fan, 4-Pin fan (60mm, Brown).

The Noctua fans are some of the quietest fans on the market today. Noctua rates this fan at 19.3 dB(A) at full power and 13.7 dB(A) when using the Low Noise Adapter. Utilizing the included NA-RC7 Low Noise Adaptor (LNA) that connects between the fan and the power source, reduces the fan’s running speed and noise emission. As the fan speed decreases so does the noise, but also the cooling capability of the fan. Some testing in your environment will be required to find the desired amount of noise while providing enough airflow for cooling the GoPro.

Fan Data:

Application	Fan	Power	Airflow-Ft/Sec	dB @ 2″	dB @ 12″	Fan RPM	Accousitc Noise dB(A)
CAMCooLER Cooling Fans for Sporting Events	GDSTIME 5v	5v	8.36 fps	65 dB	–	3800	25.8

GoPro/Mevo Studio Coolers	Noctua 12v	12v	5.8 fps	55 dB	39 dB	3200	19.3
GoPro/Mevo Studio Coolers	Noctua 12v	Low Noise Adapter	4.1 fps	48 dB	32 dB	2570	13.7
GoPro/Mevo Studio Coolers	Noctua 12v	NA-FC1 Fan Controller – High	5.8 fps	54 dB	–	3200	19.3
GoPro/Mevo Studio Coolers	Noctua 12v	NA-FC1 Fan Controller – Medium	5.0 fps	49 dB	–	2600	13.7
GoPro/Mevo Studio Coolers	Noctua 12v	NA-FC1 Fan Controller – Low	2.1 fps	40 dB	–	–	No manufacture data
Possible GoPro/Mevo Studio Coolers	Noctua 5v	5v	6.78 fps	56.5 dB	–	3440	19.3

Differences between sleeve, Hydraulic, and ball bearings on fans:

Sleeve bearing is made of porous metal that can absorb and retain lubricating oil. The lubricant filled between the blade shaft and sleeve acts as a drag reducer. Generally, the lifetime of sleeve bearing is 8000-10000 hours. It is suitable for a fan with medium or low speed.
- - Advantages: low price, low noise, suitable for intermittent use.
  - Disadvantages: high wear rate, short service life.
Hydraulic bearing has larger oil storage space than sleeve bearing and has a unique oil supply circuit of loop type. As its bottom is sealed completely, the lifetime is longer than that of the sleeve bearing. It is suitable for high, medium, and low-speed fans. The average life of hydraulic bearings is 40000-50000 hours.
- - Advantages: low noise, longer life than sleeve bearing.
  - Disadvantages: more expensive than sleeve type.
Ball bearing has the characteristics of rolling friction by metal beads, small contact surface, and small friction coefficient. Lifetime is improved because the friction of bearing surfaces is reduced. As none oil leak, it is suitable for products that are often operated in different angles and directions.
- - Advantages: Long service life, suitable for the fans with higher rotation speed
  - Disadvantages: high price, high noise level caused by rolling of metal beads.