MindMap Gallery acoustics
This is a mind map about acoustics, including the production of sound, the spread of sound, speed of sound, characteristics of sound, The use of sound, etc.
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This is a mind map about bacteria, and its main contents include: overview, morphology, types, structure, reproduction, distribution, application, and expansion. The summary is comprehensive and meticulous, suitable as review materials.
This is a mind map about plant asexual reproduction, and its main contents include: concept, spore reproduction, vegetative reproduction, tissue culture, and buds. The summary is comprehensive and meticulous, suitable as review materials.
This is a mind map about the reproductive development of animals, and its main contents include: insects, frogs, birds, sexual reproduction, and asexual reproduction. The summary is comprehensive and meticulous, suitable as review materials.
acoustics
production of sound
Object vibrates
The vibration stops, the sound stops
The original voice continues to spread
propagation of sound
medium
solid
gas
liquid
sound wave form
Sound cannot travel through a vacuum
speed of sound
Spread speed
Influencing conditions
Media type
temperature
V solid-V liquid-V gas
The propagation speed of air at 15℃ is 340 meters per second
echo
obstacle
rebound
Measure distance and depth
S=vt/2 or h=1/2vt
noise
definition
The sound of making irregular movements
interfering sound
control
prevent noise
sound source
Block noise transmission
way for spreading
Stop noise from reaching your ears
human ear
use of sound
echolocation
distinguish
Sound conveys information
provide information
sound transfers energy
cause changes in objects
sound directivity
sound characteristics
tone
definition
the pitch of the voice
Decide
The higher the frequency, the higher the pitch
judge
The more vibrations
The higher the pitch
hearing
The sound is shriller
The higher the pitch
The deeper the voice
The lower the pitch
image
The smaller the “wave number”
The smaller the frequency
The more “wave numbers”
The greater the frequency
bottle
Knock the bottle
less water
The higher the pitch
blow bottle
The more water
The higher the pitch
loudness
definition
The strength of the voice
Decide
The greater the amplitude
The louder
The farther the distance
The louder the
timbre
definition
Sound quality and character
Decide
Material
structure