Why the hearing of spectacled flying foxes is not attuned to a high frequency as that most other bat species?

The hearing of spectacled flying foxes is indeed well-attuned to high frequencies, just like most other bat species. They have a hearing range of approximately 1 kHz to 120 kHz, with their highest sensitivity between 10 kHz and 50 kHz.

Spectacled flying foxes (Pteropus conspicillatus) belong to the subfamily Pteropodinae, also known as "Old World fruit bats." This subfamily consists of large bats found in Africa, Asia, and Australia. They primarily feed on nectar and fruits and contribute significantly to pollination and seed dispersal.