A point source that is stationary on an x-axis emits a sinusoidal sound wave at a frequency of $\mathbf{\text{686 Hz}}$ and speed$\mathbf{\text{343}}\frac{\mathbf{\text{m}}}{\mathbf{\text{s}}}$. The wave travels radially outward from the source, causing air molecules to oscillate radially inward and outward. Let us define a wavefront as a line that connects points where the air molecules have the maximum, radially outward displacement. At any given instant, the wavefronts are concentric circles that are centered on the source. (a) Along x, what is the adjacent wavefront separation? Next, the source moves along at a speed of$\mathbf{\text{110}}\frac{\mathbf{\text{m}}}{\mathbf{\text{s}}}$. Along x, what are the wavefront separations (b) in front of and (c) behind the source?

Question: The pressure in a traveling sound wave is given by the equation

.$\mathit{\Delta }\mathbf{p}\mathbf{=}\left(1.50Pa\right)\mathit{s}\mathit{i}\mathit{n}\mathit{\pi }\left[\left(1.900m^{-1}\right)x-\left(1315s^{-1}\right)t\right]$

Find the (a) Pressure amplitude, (b) Frequency, (c) Wavelength, and (d) Speed of the wave

One of the harmonic frequencies of tube A with two open ends is 325Hz. The next-highest harmonic frequency is 390Hz. (a) What harmonic frequency is next highest after the harmonic frequency 195Hz? (b) What is the number of this next-highest harmonic? One of the harmonic frequencies of tube B with only one open end is 1080Hz. The next-highest harmonic frequency is 1320Hz. (c) What harmonic frequency is next highest after the harmonic frequency 600Hz? (d) What is the number of this next-highest harmonic?

Two sounds differ in sound level by $\mathbf{\text{1.00 dB}}$ . What is the ratio of the greater intensity to the smaller intensity?

The water level in a vertical glass tube$\mathbf{\text{1.00 m}}$ long can be adjusted to any position in the tube. A tuning fork vibrating at $\mathbf{\text{686 Hz}}$ is held just over the open top end of the tube, to set up a standing wave of sound in the air-filled top portion of the tube. (That air-filled top portion acts as a tube with one closed and the other end open) (a) For how many different positions of the water level will sound from the fork set up resonance in the tube’s air-filled portion, which acts as a pipe with one end closed (by the water) and the other end open? What are the (b) least (c) second least water heights in the tube for resonance to occur?

In pipe $\mathbf{A}$, the ratio of a particular harmonic frequency to the next lower harmonic frequency is $\mathbf{1.2}\mathbf{}$ .In pipe $\mathbf{B}\mathbf{}$, the ratio of a particular harmonic frequency to the next lower harmonic frequency is $\mathbf{1}\mathbf{.}\mathbf{4}\mathbf{}$. How many open ends are in (a) pipe $\mathbf{A}\mathbf{}$ and (b) pipe $\mathbf{B}\mathbf{}$?