z
Do not charge the product at a high temperature (exceeds 45
ȭ
).
z
Please stop using the built-in lithium battery if it leaks.
z
If the leakage gets into eyes, rinse with water and seek medical
attention immediately.
z
If the leakage gets on the skin, rinse immediately with water.
Terminologies
USB Power Delivery (USB PD):
USB PD is a power transfer protocol based on USB3.1 that can transmit higher
power via USB interface.
Sound pressure level (SPL):
A physical quantity used to express the size of a sound wave. Its unit is decibels
(dB). Generally, it can be represented by dB SPL.
Audible frequency range:
The range (20Hz to 20kHz) that human ear can perceive sounds.
Ultrasound:
Ultrasound generally refers to the sound with a frequency higher than 20kHz
that cannot be perceived by human ears.
Acoustic image:
Acoustic image refers to the two-dimensional data table that represents the
intensity distribution of sound sources in the spatial plane after the signal
collected by the microphone array is calculated by the sound source location
algorithm.
Color palette:
Color palette is the color data used by the cloud image for color mapping.
Acoustic cloud image:
The SPL data of each resolution point on the acoustic image is mapped to a
certain color number on the color palette according to the conversion formula
to form a color image, which is then fused with the visible image to form an
image.
Test spectrum range:
After selecting a frequency range supported by the product, the product will only
measure and display the acoustic cloud images within the frequency range, and
the sound outside the range will not be displayed.
Frequency spike:
Spike in the spectrum graph that indicates a significant source of sound in this
specific frequency.
Dynamic range:
Dynamic range is the scale of the sound source intensity that can be displayed
on an acoustic image.
Field of view:
For a camera, field of view refers to the angle formed by two diagonal points
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