Sound frequency

Presentation about sound frequency for the coursera course "Introduction to Music Production"

1. Sound Frequency Yves Jans

2. Who am I ? Hi, I’m Yves from Belgium I’m going to give some info regarding sound frequency Headphones recommended

3. Audio Frequency Periodic vibration Pitch of sound How often a wave repeats within a fixed amount of time Measured in hertz (Hz) Heinrich Rudolf Hertz

4. Human hearing Humans can hear frequencies between 20 and 20.000 Hz (20 k H z) The older a person gets the less frequencies one can hear Hear damage can also be caused by exposure to loud music/sound Which ones can you hear ? https:// www.youtube.com/watch?v=H-iCZElJ8m0

5. Animal hearing Animals can often hear other frequency levels and/or a wider range Dogs: 40 Hz – 60 kHz Cats: 55 Hz – 79 kHz Bats: 1 kHz – 200 kHz

6. Wavelength Sound propagates as longitudinal waves in air But sound waves are most often represented as a transverse wave:

7. Wavelength The wavelength of a sound with a 20 Hz frequency is 17 meters This explains why you mostly hear bass (low frequency sounds) from a distance when a party/festival is going on

8. Wavelength The wavelength of a sound with a 20 kHz frequency is 1,7 centimeters

9. Wavelength A 1500 Hz frequency is more profound for humans as its wavelength fits between the ears This is because of the interaural time difference (ITD), the difference in arrival time of a sound between two ears

10. Instrument frequencies Piano First key (lowest note): 27,5 Hz Last key (highest note): 4186,01 Hz

11. Instrument frequencies Guitar 1 st string (E): 329,63   Hz 2nd string (B): 246,94 Hz 3 rd string (G): 196,00 Hz 4 th string (D): 146,83 Hz 5 th string (A): 110,00 Hz 6 th string (E): 82,41 Hz

12. Vocal frequency range Soprano: 262 Hz – 1047 Hz Mezzo-soprano: 110 Hz – 880 Hz Contralto : 175 Hz – 698 Hz Tenor: 130 Hz – 523 Hz Baritone: 87 Hz – 349 Hz Bass: 87 Hz – 330 Hz

13. Thank you Thank you for watching this slideshow and I hope you picked up something new from it ! Feedback/corrections always welcome !