Sound 1 Flashcards
What is sound?
- Sound waves are variatons of pressure traveling through a medium.
- They are created by vibrations from an object.
- The waves then travel from the object to the ear, through air, causing the eardrums to vibrate.
What is Audio?
Audio is the reproduction of sound.
*specially the sound range that is dectable to the human ear.
20 Hz - 20 kHz (20,000 Hz)
What are the properties of a sound wave?
- Wavelength
- Frequency (Hz)
- Amplitude (dB)
- Velocity
Define Wavelength
The distance traveled by a sound wave in one cycle.
Define Frequency.
The number of times the wavelength occurs in one second.
Human range: 20 Hz - 20 kHz
Define Amplitude
The maximum displacment from the center line.
Volume is subjective to the listener.
Define Velocity
The speed at which the sound wave is moving.
Define Timbre
The tone-colour or tone quality of a sound. It is how we identify the difference between the quality of tone of one instrument/voice from another
Use the frequency specturm to define your timbre or “tone quality”
Define Space
The interaction between the environment and sound source will create alteration to the sound.
Peak
Measurment of the maxium positive or negative signal level of the wave
Peak-to-Peak: total measurment of positive and negative peak.
RMS
Root Mean Spuare
A measurment of how we hear
Compression
A high value on sound wave. increased air pressure.
Rarefaction
Low point on a sound wave. Air molecules are spread out.
Fundamental
Lowest frequency of a sound.
Ex 440 Hz
Harmonics
A integer of the fundamental.
(integer is a whole number)
Ex: 440 Hz x 2 = 880 Hz
880 Hz is a Harmonic of the fundamental.
