waves and sounds ch. 18 frequency and pitch a pitch is the highness or lowness of a sound. the...

Waves and Sounds Waves and Sounds Ch. 18 Ch. 18

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Frequency and Pitch  A pitch is the highness or lowness of a sound.  The pitch you hear depends on the frequency of the sound waves.

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Page 1: Waves and Sounds Ch. 18 Frequency and Pitch A pitch is the highness or lowness of a sound. The pitch you hear depends on the frequency of the sound

Waves and SoundsWaves and Sounds

Ch. 18Ch. 18

Page 2: Waves and Sounds Ch. 18 Frequency and Pitch A pitch is the highness or lowness of a sound. The pitch you hear depends on the frequency of the sound

Frequency and PitchFrequency and Pitch A A pitch pitch is the is the

highness or highness or lownesslowness of a sound. of a sound.

The pitch you hear The pitch you hear depends on the depends on the frequencyfrequency of the of the sound waves.sound waves.

Page 3: Waves and Sounds Ch. 18 Frequency and Pitch A pitch is the highness or lowness of a sound. The pitch you hear depends on the frequency of the sound

Frequency and PitchFrequency and Pitch The The higher higher the frequency, the the frequency, the higherhigher

the pitch.the pitch.

Healthy Human Ear can hear from Healthy Human Ear can hear from 200 Hz to 20,000 Hz.200 Hz to 20,000 Hz.

Page 4: Waves and Sounds Ch. 18 Frequency and Pitch A pitch is the highness or lowness of a sound. The pitch you hear depends on the frequency of the sound

Frequency and PitchFrequency and Pitch 2 kinds of waves 2 kinds of waves

we can’t hear:we can’t hear:

Ultrasonic wavesUltrasonic waves – – frequency above frequency above 20,000 Hz20,000 Hz• Used in Used in sonarsonar as as

well as in medical well as in medical diagnosis and diagnosis and treatmenttreatment

Page 5: Waves and Sounds Ch. 18 Frequency and Pitch A pitch is the highness or lowness of a sound. The pitch you hear depends on the frequency of the sound

Frequency and PitchFrequency and Pitch Infrasonic wavesInfrasonic waves – –

frequency below frequency below 20 Hz20 Hz• Produced by Produced by

heavy machinery heavy machinery or or thunderthunder…you …you can feel it can feel it rumble in your rumble in your body but not body but not actually hear itactually hear it

Page 6: Waves and Sounds Ch. 18 Frequency and Pitch A pitch is the highness or lowness of a sound. The pitch you hear depends on the frequency of the sound

Intensity and LoudnessIntensity and Loudness IntensityIntensity of a sound of a sound

wave depends on the wave depends on the amount of energyamount of energy in in each wave.each wave.• This corresponds to a This corresponds to a

wave’s wave’s amplitudeamplitude..• As intensity of a As intensity of a

sound wave sound wave increasesincreases, the , the amplitude amplitude increasesincreases..

Page 7: Waves and Sounds Ch. 18 Frequency and Pitch A pitch is the highness or lowness of a sound. The pitch you hear depends on the frequency of the sound

Intensity and LoudnessIntensity and Loudness LoudnessLoudness is the is the

human perceptionhuman perception of sound intensity.of sound intensity.

• Measured in Measured in decibelsdecibels (dB). (dB).

Page 8: Waves and Sounds Ch. 18 Frequency and Pitch A pitch is the highness or lowness of a sound. The pitch you hear depends on the frequency of the sound

Doppler EffectDoppler Effect An An increase or increase or

decreasedecrease in in wave wave frequencyfrequency, , caused by caused by motion motion of the of the source and/or source and/or motion of the motion of the observer.observer.

Page 9: Waves and Sounds Ch. 18 Frequency and Pitch A pitch is the highness or lowness of a sound. The pitch you hear depends on the frequency of the sound

Doppler EffectDoppler EffectNot Moving

Moving

Higher fSmaller Higher pitch

Lower fHigher Lower pitch

Page 10: Waves and Sounds Ch. 18 Frequency and Pitch A pitch is the highness or lowness of a sound. The pitch you hear depends on the frequency of the sound

Doppler EffectDoppler Effect

Page 11: Waves and Sounds Ch. 18 Frequency and Pitch A pitch is the highness or lowness of a sound. The pitch you hear depends on the frequency of the sound

What is music?What is music? NoiseNoise has has no set no set

patternpattern and no and no definite pitch.definite pitch.

MusicMusic has a has a regular regular patternpattern, created , created using using specific specific pitchespitches and sound and sound quality.quality.

Pitch Extraction and Fundamental Frequency: History and ...gerhard/publications/TRdbg-Pitch.pdf · Fundamental frequency (f 0) estimation, also referred to as pitch detection, has

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1 Multiple Fundamental Frequency Estimation by Modeling ...zduan/resource/Duan... · fundamental frequency, pitch estimation, spectral peaks, maximum likelihood. I. ... Klapuri [16],

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KEY CONCEPT Frequency determines pitch. · Frequency determines pitch. EXPLORE Pitch Why does the sound change? PROCEDURE ... Doppler effect. To listeners outside a train, the sound

Frequency (pitch): Dimension of frequency determined by wavelength of sound…measured in hertz (Hz) Humans can hear sounds at frequencies from about 20Hz

Voice Pitch Elicited Frequency Following Response in Chinese … · 2019. 6. 23. · Voice Pitch Elicited Frequency Following Response in Chinese Elderlies Shuo Wang 1 *, Jiong Hu