How loud is the Lymow One compared with other robot mowers?

Louder than most. Lymow quoted 68 dB(A) for the Lymow One, marked as a lab figure. Many garden robot mowers are quoted somewhere in the mid-50s to low-60s dB(A). For example, TerraMow quotes 54 dB(A) for the TerraMow V Series (V600 / V1000), and Sunseeker quotes 60 dB(A) for the Sunseeker X7.

Decibels are logarithmic, so a difference of around 10 dB is generally perceived as roughly twice as loud. That makes the gap between the Lymow One and the quieter robot mowers noticeable, especially in a quiet street.

Lymow doesn't explain the figure, but the design is quite different from most robot mowers. The One uses rotary mulching blades across a 400 mm deck, and runs on tracks, rather than the small pivoting razor blades most robot mowers use. Larger rotary blades generally make more noise than small razor blades. Manufacturers don't all measure noise the same way, so treat any comparison as a rough guide.

In practice, keep the schedule to daytime hours. That's considerate to neighbours and also avoids night-time running, which the British Hedgehog Preservation Society advises against. Lymow hasn't published a noise figure for the newer Lymow One Plus, so we can't say whether it's any quieter. See our hedgehogs guide for scheduling advice.