The noise level produced by the vacuum cleaner during operation. Usually, the value for normal operation at maximum engine power is indicated here. With less power, the loudness of the unit may be lower, but the key is precisely the maximum indicator.
Regarding specific numbers, keep in mind that the decibel used to measure the noise level is a non-linear quantity. Therefore, it is worth evaluating specific indicators using special comparative tables. In general, vacuum cleaners are quite noisy appliances; so in this case, models are considered quiet if this indicator
does not exceed 65 dB — this is the level of a loud conversation between 2 – 3 people at a distance of 1 m. The quietest of these models give out only 40 dB — this is the average volume of a person’s speech in normal tones (and the minimum volume allowed for constant noise sources in living quarters during the day). For louder units, the comparison table looks like this:
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66 – 70 dB — loud conversations between several groups of people at a distance of about 1 m;
—
71 – 75 dB — the volume of a cry or laughter in full voice at a distance of about 1 m;
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76 – 80 dB — the volume of a mechanical alarm clock or the engine of an old truck;
—
more than 80 dB — a very high noise level, exceeding the level of a loud scr
...eam; when working with a vacuum cleaner having such specifications for a long time, it is highly desirable to use hearing protection.
Also note that the noise level largely depends on the engine power, as well as some other features (for example, it is strongly affected by the presence of an aquafilter — see "Dust collector"). At the same time, there is no hard connection here, and units with a similar set of specifications can differ markedly in actual loudness. In such cases, when choosing here, it is worth proceeding from the fact that a quieter vacuum cleaner will be more comfortable to use. However, it will most likely cost noticeably more.The length of the power cord that is equipped with a vacuum cleaner powered by an outlet.
Here we note that manufacturers select the specific length of the cord depending on the general purpose of the unit. In general, the length
of 4 – 5 m and
less can be called small,
5 – 6 m — medium,
6 – 7 m and
7 – 8 m — more than average, and in some models this figure is
more than 8 m. However, a lot depends on the specifics of the vacuum cleaner. For example, among conventional units there are many models with a 4-5 m wire (this is enough for cleaning on the scale of an apartment, a private house or a small office space), but for industrial solutions this is a very limited indicator.
Keep in mind that a longer power cord is not always more convenient. On the one hand, it provides more freedom when working. On the other hand, it can create inconvenience at a short distance from the outlet as well as during storage/transportation. In addition, you can use an extension cord to work away from the outlet. So when choosing, you need to take into account the specific needs of the use of a vacuum cleaner. Detailed recommendations for different situations can be found in special sources.
