Why Doesn't Hand Swaying Produce Sound?

  • Context: High School 
  • Thread starter Thread starter batballbat
  • Start date Start date
  • Tags Tags
    Sound
Click For Summary
SUMMARY

Hand swaying does not produce audible sound due to its low frequency and amplitude, which fall below the threshold of human hearing. In contrast, scratching skin generates sound within the audible range. Sudden, fast movements of the hand can create a dull "thump" that resembles a gust of wind, but this sound is still low in frequency. Additionally, the Doppler effect can be perceived when a pure sine wave is generated from a speaker and the listener moves their head rapidly towards or away from the source.

PREREQUISITES
  • Understanding of sound frequency and amplitude
  • Basic knowledge of human hearing range
  • Familiarity with the Doppler effect
  • Experience with sound wave generation techniques
NEXT STEPS
  • Research sound frequency thresholds for human hearing
  • Explore the principles of the Doppler effect in sound waves
  • Learn about sound wave generation using pure sine waves
  • Investigate the relationship between sound amplitude and perception
USEFUL FOR

Acoustics researchers, audio engineers, and individuals interested in the physics of sound and human auditory perception.

batballbat
Messages
127
Reaction score
0
Why doesen't hand swaying produce sound and why does my slight scratching my skin produce an audible sound?
 
Physics news on Phys.org
It does, it's just too low frequency/amplitude for you to hear it. Scratching is within the range of human hearing.
 
It can, if you move your hand suddenly, and fast enough towards your ear, you can detect a dull "Thump", but it's so low in frequency that it's more of a gust of wind. In passing, you can actually hear a doppler shift if you generate a pure sine wave from a speaker and jerk your head towards it very hard...or away from it.
 

Similar threads

Undergrad Does two-slit sound-wave interference pattern return to original form?
  • · Replies 10 ·
Replies
10
Views
2K
High School Why Is Sound Produced by Vibrations?
  • · Replies 11 ·
Replies
11
Views
4K
High School Why do things produce sound even though no pressure is applied to them?
  • · Replies 5 ·
Replies
5
Views
5K
High School What sound frequencies can pass through a hole in a wall?
  • · Replies 31 ·
2
Replies
31
Views
5K
High School About actually touching something and sound made by collision
  • · Replies 10 ·
Replies
10
Views
2K
High School No sound in vacuum? So can I clap more?
  • · Replies 12 ·
Replies
12
Views
3K
High School Why sound produced by rapids varies in pitch based on height
  • · Replies 9 ·
Replies
9
Views
2K
High School How a whistle produces a sound?
  • · Replies 12 ·
Replies
12
Views
6K
Undergrad Why is my Sondhauss tube not producing any sound?
  • · Replies 1 ·
Replies
1
Views
1K
WhatsApp is overriding my sound setting
  • · Replies 2 ·
Replies
2
Views
3K