Zitat von Inscrutable1:

Also ist es wahr, das man sich ab ca 160 dB außer nem satz kaputter Ohren auch wirklich Verbrennungen holen kann?

Zitat von Inscrutable1:

Also ist es wahr, das man sich ab ca 160 dB außer nem satz kaputter Ohren auch wirklich Verbrennungen holen kann?

Zitat:

With respect to effects on humans, some of the allegations are: Infrasound at 110-130 dB would cause intestinal pain and severe nausea. Extreme levels of annoyance or distraction would result from minutes of exposure to levels 90 to 120 dB at low frequencies (5 to 200 Hz), strong physical trauma and damage to tissues at 140-150 dB, and instantaneous blastwave type trauma at above 170 dB (for an explanation of the level unit decibel see section 1.5 below). At low frequencies, resonances in the body would cause hemorrhage and spasms; in the mid-audio range (0.5-2.5 kHz) resonances in the air cavities of the body would cause nerve irritation, tissue trauma and heating; high audio and ultrasound frequencies (5 to 30 kHz) would cause heating up to lethal body temperatures, tissue burns, and dehydration; and at high frequencies or with short pulses, bubbles would form from cavitation and micro-lesions in tissue would evolve.

Zitat von DinoRS1337:

Letztendlich sollte das von Prinzip her ähnlich wirken wie eine Mikrowelle auf Essen, kann aber definitiv nur im (fast) unhörbaren Bereich passieren, über einen längeren Zeitraum (was Explosionen ausschließt) einwirkend.

Zitat von Rifleman:

Nicht wirklich.

Zitat:

At levels of 160 dB and higher, heating becomes relevant. When, in tests of the small siren mentioned in 3.2 below, a hand was put into the beam with 200 W acoustic power at 7 kHz (level 165 dB), strong heating due to high friction was felt between fingers held close together, but not touching; the effect vanished if the fingers were opened. With 2 kW power, increasing heat was felt in the central lobe of the beam on the palm of the hand; cotton burnt within a few seconds.134 The difference can be explained by the amount of sound absorption: whereas it is small on naked skin due to the impedance mismatch, it becomes strong wherever strong friction impedes the air movement, as in textiles, hair, or narrow ducts. With the more powerful siren, experimenters at times observed a loss of the sense of equilibrium or slight dizziness, even when wearing ear protection.

Zitat:

At extreme levels, close to the siren of maximum 160-165 dB, tickling in mouth and nose was observed with ultrasound as with high-frequency audio sound. For such levels, as with high audio frequencies, heating will occur mostly in narrow passages and other places of high friction. Above about 160 dB, heating will be felt on naked skin as well. For bare skin at 20 kHz, an absorbed-intensity ratio of below 10^-3 was measured; theoretically, then, total immersion in an ultrasound field above 180 dB would be required to overheat a human body to death after more than 50 minutes.
On the other hand, the absorption ratio of rat fur is above 0.2, and thus lethal
overheating should occur in 10 minutes of 155-158 dB. In fact, rats and mice were killed by 148-158 dB in 4 to 10 minutes at audio frequencies (where fur absorption is lower) between 1 and 15 kHz; at 20 kHz with 160-165 dB they died in one minute. At the latter level, shaved animals survived
about three times longer. In all cases the cause of death was too high body temperature.

Zitat:

With 2 kW power, increasing heat was felt in the central lobe of the beam on the palm of the hand; cotton burnt within a few seconds.

Zitat von DinoRS1337:

wärend bei der Mikrowelle die Induktion diese hohen Wellen zur Erwärmung nutzt.

Zitat von DinoRS1337:

Wäre bzw. ist in beiden Fällen die Frequenz niedrig genug, passiert nichts (hier: es findet keine Erwärmung statt) und umgekehrt.