SOUND WAVES are the result of VIBRATIONS. A SOUND WAVE is a LONGITUDINAL WAVE but it is drawn as a...
-
Upload
delilah-perry -
Category
Documents
-
view
215 -
download
1
Transcript of SOUND WAVES are the result of VIBRATIONS. A SOUND WAVE is a LONGITUDINAL WAVE but it is drawn as a...
SOUND WAVESSOUND WAVES are the result of are the result of
VIBRATIONSVIBRATIONS
A A SOUND WAVESOUND WAVE is a is a LONGITUDINAL WAVE LONGITUDINAL WAVE but it but it is drawn as a transverse waveis drawn as a transverse wave
Since a sound wave consists of a repeating pattern of high pressure and low pressure regions moving through a medium, it is sometimes referred to as a pressure wave
Sound is a Sound is a MECHANICAL WAVEMECHANICAL WAVE
Sound requires a medium Sound can travel in a solid, liquid, or gas
The The SpeedSpeed of SOUND in AIR of SOUND in AIR
The speed of sound 331 m/s at 00C The speed of sound increases about 0.6 m/s for each
0C rise in temperature
Sound travels faster in liquids and fastest in solids than in air (a gas) because the molecules are closer together
vT = v0 + 0.6T
The The FrequencyFrequency of a SOUND WAVEof a SOUND WAVE
Represents the PITCH or a NOTE on a MUSICAL SCALE
Frequencies of SoundFrequencies of Sound The human ear is capable of detecting sound waves between
20 Hz to 20 000 Hz. Any sound with a frequency below the audible range of
hearing is an infrasound and any sound with a frequency above the audible range of hearing is known as an ultrasound.
Dogs can detect frequencies between 50 Hz and 45 000 Hz. Bats, who must rely on sound echolocation for navigation and
hunting, can detect frequencies as high as 120 000 Hz. Dolphins can detect frequencies as high as 200 000 Hz. An elephant possesses the unusual ability to detect
infrasound, having an audible range from approximately 5 Hz to approximately 10 000 Hz.
The The AMPLITUDEAMPLITUDE of a SOUND WAVEof a SOUND WAVE
Represents the LOUDNESS of the sound
LOUDNESS in DecibelsLOUDNESS in Decibels0 Silence
10 Heartbeat
20 Whisper
30 Soft piano
50 Soft talking
60 Conversation
80 Street traffic
90 Food blender
110 Thunder
120 Painful sounds
170 Jet engine
ResonanceResonance
Resonance occurs when two interconnected objects share the same frequency.
Resonance occurs when one object vibrating at the same natural frequency of a second object forces that second object to vibrate.
The Doppler EffectThe Doppler Effect
The Doppler EffectThe Doppler Effect