Characteristics of Sound
This characteristic measures how loud a sound is.
What is amplitude?
This type of filter allows only low frequency sounds through, blocking high frequencies.
What is a low-pass filter?
The waveform produced by this type of resonator is typically a simple, smooth, periodic waveform
What is the formula for calculating the wavelength of a sound wave?
What is wavelength = velocity / frequency?
On a graph of a sound wave, the vertical axis (y-axis) usually represents this property.
What is amplitude?
Measured in Hertz (Hz), this term describes how many cycles a sound wave completes per second.
What is frequency?
This type of audio filter would be used to eliminate an annoying low-frequency hum in a recording.
What is a high-pass filter?
This musical instrument is an example of a tube resonator.
What is a flute (or pipe organ/recorder)?
The period (T) of a wave is calculated using this formula.
What is period = 1 / frequency?
The horizontal axis (x-axis) on a time-domain graph typically represents this.
What is time?
The distance between two adjacent wave crests is called this.
What is wavelength?
A filter that only lets a narrow range of frequencies pass is called this.
What is a band-pass filter?
The air column inside a closed pipe vibrates at resonant frequencies, making the pipe act as this type of resonator.
What is a tube resonator?
The frequency of a sound wave that has a period of 0.01 s.
What is 100 Hz? (frequency = 1 / period)
A sine wave is an example of this type of waveform.
What is a periodic waveform?
This term describes the length of time it takes for one cycle of a wave.
What is period (T)?
This filter "stops" frequencies within a certain range, and passes those outside that range.
What is a band-stop filter?
Increasing the ____ of a resonator lowers the resonant frequency and increasing the ____ of a resonator raises the resonant frequency.
What is mass and stiffness?
The wavelength of a sound that travels at 340 m/s and has a frequency of 170 Hz.
What is 2 meters? (340 / 170 = 2)
A clap, static or noise burst creates this type of waveform.
What is an aperiodic waveform?
The unique quality that allows us to distinguish between the sound of a piano and a trumpet playing the same note at the same loudness is known as this characteristic.
What is timbre?
This type of filter would be used if you want to allow only a middle range of frequencies—such as the frequencies of a person’s voice—to pass through, while removing both low and high frequencies.
What is a band-pass filter
Name a situation outside of music where you might encounter a Helmholtz resonator.
What is the sound of blowing over the neck of a soda bottle?
The fifth harmonic of a vibrating string with a fundamental frequency of 200 Hz.
What is 1000hz?
This type of graph shows the distribution of a sound’s energy across different frequencies, displaying frequency on the x-axis and amplitude on the y-axis.
What is frequency domain?