Hedgehogs Can Hear Super High Sounds Up To 85 kHz, New Study Shows

Hedgehogs can hear sounds 4 times higher than humans! This is because of a special bone in their ear.
By Newsroom | Animal Science, Wildlife |

BONE MECHANISM UNLOCKS ULTRA-HIGH FREQUENCIES

Scientists have detailed how the hedgehog's inner ear, a complex arrangement of bone, facilitates hearing frequencies far exceeding human capabilities. This specialized anatomy allows these small mammals to perceive sounds up to 85 kilohertz (kHz), a range previously associated with creatures like echolocating bats.

The critical finding centers on a stiffened chain of bones within the hedgehog's auditory system. This rigidity ensures that high-frequency sound waves transmit efficiently to the inner ear, enabling the detection of these ultra-high pitches. This contrasts sharply with the human auditory range, which typically caps out at around 20 kHz, and even surpasses that of common domestic animals like dogs (up to 45 kHz) and cats (up to 65 kHz). The discovery suggests hedgehogs may engage in a sonic landscape previously unimagined, possibly utilizing these high frequencies for communication beyond their commonly observed vocalizations.

POTENTIAL APPLICATIONS AND CONSERVATION

The implications of this heightened auditory perception extend beyond mere biological curiosity. Researchers are exploring the potential for developing 'ultrasound repellents' designed to deter hedgehogs from dangerous situations, such as roadways and agricultural machinery. The idea is that these devices would emit sounds within the hedgehog's hearing range, thus warning them of approaching vehicles or equipment without affecting human or domestic animal senses.

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This pursuit of technological solutions arises amid concerns for hedgehog populations, which face threats from traffic and habitat alteration. The capacity to understand and potentially manipulate their auditory environment could offer a novel avenue for 'hedgehog protection efforts', though the practical efficacy and broader ecological impact of such deterrents remain subjects for further investigation and cautious observation.

SOCIAL RESONANCE AND SCIENTIFIC SURPRISE

News of the hedgehog's extraordinary hearing has circulated widely, reportedly causing considerable surprise across social media platforms. The revelation challenges common perceptions of hedgehogs, often seen as simple, rustling creatures, and highlights the hidden complexities of their sensory world.

The research builds upon existing knowledge of high-frequency hearing in other species, drawing parallels with the sophisticated echolocation abilities of bats, which also rely on the transmission of high-pitched sounds. Further supplementary coverage has appeared in outlets such as Phys.org, and the foundational research has been published in Royal Society Publishing.

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Frequently Asked Questions

Q: How high can hedgehogs hear sounds?
Hedgehogs can hear sounds up to 85 kilohertz (kHz). This is much higher than humans, who can only hear up to about 20 kHz.
Q: What makes hedgehogs hear these high sounds?
A special stiff chain of bones in the hedgehog's inner ear helps them hear these very high sounds. This makes sure the sound waves reach their ear easily.
Q: Why is this discovery important for hedgehogs?
Scientists think this could help protect hedgehogs. They might create devices that make high sounds to warn hedgehogs away from danger like cars or machines.
Q: How does hedgehog hearing compare to other animals?
Hedgehogs can hear much higher sounds than humans (up to 85 kHz vs 20 kHz). They can also hear higher than dogs (up to 45 kHz) and cats (up to 65 kHz).
Q: Where was this research published?
The research about hedgehog hearing was published in Royal Society Publishing. More information can also be found on Phys.org.