Audible Sounds

• Audible Sounds for humans are usually stated as between 20 Hz and 20,000 Hz. i.e 20 Hz – 20 kHz
• Loudness or volume of sound waves increases as amplitude of the vibrations increases. Since increased loudness is caused by more vigorous vibrations, it is a measure of the amount of energy carried by the sound.
• Pitch of the sound waves is determined by the number of waves formed in 1 s or its frequency. High pitch notes are high frequency, low pitch notes are low frequency sounds.
• The characteristic of sound that allows us to differentiate between 2 different sources of sound with the same pitch and loudness is its quality or timbre (pronounced TAM-buh).

 

• A musical sound consists of tones of many different frequencies.
• The lowest frequency is called the fundamental frequency f_o (or first harmonic).
• A harmonic is any tone whose frequency is a multiple of f_o.
• The second harmonic has a frequency 2 f_o.

The above c.r.o. displays show waveforms of sounds from 3 different musical instruments which differ only in their quality. They have different harmonics but the same fundamental frequency.

https://onlinetonegenerator.com/

<< Back

Waves & Sound

Next >>