Rangehood noise is one of the most talked-about aspects of rangehood performance among Australian buyers, and yet it's one of the least well understood. Walk into any kitchen appliance showroom and you'll see decibel ratings listed on the spec sheet, but without context, a number like "52 dB" or "68 dB" means very little to most people. This guide explains what rangehood noise ratings actually mean, what you should expect at different price points and fan speeds, and what you can do to minimise noise in your kitchen.

Understanding Decibels

The decibel scale is logarithmic, not linear, which means the difference between 50 dB and 60 dB is not just 10 units — 60 dB is perceived as roughly twice as loud as 50 dB. To put rangehood ratings in everyday context: a normal conversation is around 60 dB, a quiet library is around 40 dB, and a busy office is around 65–70 dB. Most rangehoods operate somewhere between 45 dB (very quiet, on low speed) and 75 dB (a powerful hood running on boost/maximum speed).

How Rangehoods Are Rated

Manufacturers typically publish noise ratings at maximum fan speed, since this is the most demanding operating condition. Some also publish ratings at the lowest speed, which is more useful for day-to-day comparisons since most people cook on medium or low-medium settings the majority of the time.

A rangehood rated at 65 dB at maximum speed will typically run at 50–55 dB on its lowest setting, which most people find perfectly comfortable to cook under and hold a normal conversation. A rangehood rated at 72 dB at maximum speed — which would be considered loud — may still only produce 58–62 dB on medium, which is liveable for most households.

The key question to ask when evaluating noise is: at what speed will I use this rangehood most of the time? If you're a light-to-moderate cook who primarily uses medium speed and only cranks to maximum when frying, a higher max dB rating isn't necessarily a dealbreaker.

What dB Rating Should You Target?

For a quiet kitchen experience — particularly in open-plan living areas where the cooking zone flows directly into living and dining spaces — a rangehood rated at 65 dB or below at maximum speed is a good target. In the 55–65 dB range at max speed, you'll typically still be able to hold a conversation, watch TV, or hear background music without significant effort.

For a moderate cooking environment where some noise is acceptable, 65–70 dB at maximum speed is the mainstream range and represents the majority of quality mid-range rangehoods.

Above 70 dB at maximum speed is territory typically occupied by very high-extraction-power commercial-style rangehoods, where power has been prioritised over noise. These are appropriate for high-performance kitchen setups with 5-burner gas cooktops or commercial wok burners, but would be intrusive in a typical family kitchen.

Factors That Affect Real-World Noise

The dB rating published by the manufacturer is measured under ideal laboratory conditions. Real-world noise in your kitchen depends on several additional factors that are worth understanding.

Duct installation quality is significant. A well-designed duct run with minimal bends and appropriate diameter significantly reduces turbulence noise generated by air moving through the system. A poorly routed duct — narrow, with multiple sharp bends — creates restriction that causes the motor to work harder and generates more airflow noise. If your rangehood seems louder than its spec sheet suggests, duct inspection is the first place to look.

Remote motor setups, mentioned in our ducted versus recirculating guide, eliminate motor noise at the cooking zone almost entirely by locating the motor in the roof cavity. For households where kitchen noise is a significant priority — particularly open-plan homes or those with young children who sleep nearby — this is a premium solution worth the investment.

Filter condition also affects noise. Clogged filters restrict airflow, causing the motor to work against higher resistance and increasing operating noise. Regularly cleaned filters keep the system running at its design noise level.

Does More Powerful Always Mean Louder?

Not necessarily. Engineering quality plays a large role in noise outcomes independent of extraction power. Premium rangehood brands invest in vibration isolation mounts, aerodynamically optimised impellers, and cabinet materials that absorb rather than amplify motor vibration. Some of the highest-performing rangehoods on the Australian market are also among the quietest, because the engineering quality is high across the board. This is generally reflected in price — rangehoods at the premium end of the market command their prices partly because of this engineering investment in noise reduction.

Practical Guidance

When you're comparing rangehoods, look for dB ratings at medium speed if available, not just maximum. Read reviews from Australian buyers, particularly in open-plan kitchen settings, for real-world noise impressions. If noise is a primary concern, consider whether a remote motor installation is feasible in your kitchen. And remember that clean filters and good duct installation can meaningfully reduce operational noise beyond what the spec sheet predicts.