sound

This Heat Pump Uses Sound

- Adam Clare

AI generated image of energy efficient home
Normal heat pumps make use of chemicals to modulate temperatures, in the future they may all use sound. A new French startup has announced they will sell a residential heat pump using acoustics. It’s not loud since the sound waves stay in the system to change the temperature, which also means the system can be quickly adjusted. Using acoustics for temperature control isn’t new (it’s used on the James Webb space telescope), this application of it in a residential system is novel.

Loyer said the heat pump can generate domestic water at up to 80 C. He claims that one of the key benefits of the acoustic heat pump, in comparison with traditional units using refrigerants, is its ability to reach very high or low temperatures.

“Traditional heat pumps use refrigerants with a temperature phase. They a have temperature limit, which is the temperature of the changing phase from liquid to gas of the refrigerant,” said Loyer. “In our core, the helium stays in gas form. Because helium remains a gas until -200 C, we can achieve higher temperatures inside our heat pump core.”

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Celebrate Silence for a Clear Mind

- Adam Clare

desert and stars

For a healthy body and mind one ought to embrace silence. It turns out that silence is really helpful for our minds and can bring health benefits. The research into how good silence is for us is still up and coming but the results are looking good! Indeed, silence is so golden that Finland has even modified their tourism campaign to reflect the appeal of quietness.

So we like silence for what it doesn’t do—it doesn’t wake, annoy, or kill us—but what does it do? When Florence Nightingale attacked noise as a “cruel absence of care,” she also insisted on the converse: Quiet is a part of care, as essential for patients as medication or sanitation. It’s a strange notion, but one that researchers have begun to bear out as true.
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The blank pauses that Bernardi considered irrelevant, in other words, became the most interesting object of study. Silence seemed to be heightened by contrasts, maybe because it gave test subjects a release from careful attention. “Perhaps the arousal is something that concentrates the mind in one direction, so that when there is nothing more arousing, then you have deeper relaxation,” he says.

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Wind Turbines are not a Health Risk

- Adam Clare 2 Comments

A small group of people have complained and argued that wind turbines can cause health problems. A new study confirms that those people are wrong and in fact wind turbines are not a health risk at all.

The study acknowledges that a minority of people find the intermittent swooshing noise emitted by the turbines’ giant blades to be annoying, but it also concluded: “Annoyance is not a pathological entity.”

The study says there’s “nothing unique” about the noise or vibrations emitted by wind turbines and no evidence that the audible or sub-audible sounds have any direct adverse effect on health.

It suggests that those who are bothered by turbines simply have a lower tolerance for annoying sounds of all sorts.

“A major cause of concern about wind turbine sound is its fluctuating nature. Some may find this sound annoying, a reaction that depends primarily on personal characteristics as opposed to the intensity of the sound level.”

Keep reading at the CBC.

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