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- https://phys.libretexts.org/Bookshelves/Waves_and_Acoustics/Book%3A_Sound_-_An_Interactive_eBook_(Forinash_and_Christian)/06%3A_Wave_Behavior/6.10%3A_DiffractionSometimes waves don't travel in a straight line, even if their speed does not change (as in the case of refraction). For example, you can hear the conversation in the next room even though you cannot ...Sometimes waves don't travel in a straight line, even if their speed does not change (as in the case of refraction). For example, you can hear the conversation in the next room even though you cannot see the source. This is because sound waves undergo diffraction, bending as they go through the doorway between the two rooms.
- https://phys.libretexts.org/Bookshelves/Waves_and_Acoustics/Book%3A_Sound_-_An_Interactive_eBook_(Forinash_and_Christian)/09%3A_The_Ear_and_Perception/9.01%3A_The_Ear_and_Perception/9.1.04%3A_Hearing_LossThis may cause scars to form in the middle ear region that block or modify the transmission of vibrations along the bone passageway. If a very loud vibration causes the stapes to pierce the cochlea vi...This may cause scars to form in the middle ear region that block or modify the transmission of vibrations along the bone passageway. If a very loud vibration causes the stapes to pierce the cochlea vibrations will no longer be efficiently transmitted to the hair nerve cells. Likewise a very large vibration inside the cochlea may break the hair cells so that they can no longer bend in response to vibrations of the basilar membrane.
- https://phys.libretexts.org/Bookshelves/Waves_and_Acoustics/Book%3A_Sound_-_An_Interactive_eBook_(Forinash_and_Christian)/16%3A_Electricity_and_Magnetism/16.01%3A_EandM-_Ohm's_Law/16.1.01%3A_Ohm's_LawThe protons and neutrons (each of which is 1800 times heavier than the electron) are found at the center of the atom in the nucleus. Although the same current (electrons per second) flows out of the c...The protons and neutrons (each of which is 1800 times heavier than the electron) are found at the center of the atom in the nucleus. Although the same current (electrons per second) flows out of the component as flows in, the total current in the circuit is controlled by the resistance of the circuit. If you want make a brighter light bulb, do you want to increase the resistance or decrease the resistance of the filament? (Hint: The brightness increases if more current flows.)
- https://phys.libretexts.org/Bookshelves/Waves_and_Acoustics/Book%3A_Sound_-_An_Interactive_eBook_(Forinash_and_Christian)/13%3A_VoiceThe vocal chords are the vibrating part and the throat, mouth, nasal cavities and bronchial tubes constitute the resonance cavities that amplify these vibrations into sound. The fact that we can chang...The vocal chords are the vibrating part and the throat, mouth, nasal cavities and bronchial tubes constitute the resonance cavities that amplify these vibrations into sound. The fact that we can change the shape of some of these cavities at will enables us to produce a wide range of pitches, depending on the initial structure and training.
- https://phys.libretexts.org/Bookshelves/Waves_and_Acoustics/Book%3A_Sound_-_An_Interactive_eBook_(Forinash_and_Christian)/12%3A_Percussion/12.01%3A_Percussion_and_DrumheadsThis section allows you to see and manipulate the modes for a square drum head. You can change the modes using the sliders to change the mode numbers n and m. For a membrane there are nodal li...This section allows you to see and manipulate the modes for a square drum head. You can change the modes using the sliders to change the mode numbers n and m. For a membrane there are nodal lines which do not vibrate similar to the nodes we saw on the string but now in two dimensions. You can rotate and enlarge the surface by dragging the mouse over the image. Just like the case for a vibrating string, more than one mode can be present on the two dimensional surface at the same time.
- https://phys.libretexts.org/Bookshelves/Waves_and_Acoustics/Book%3A_Sound_-_An_Interactive_eBook_(Forinash_and_Christian)/03%3A_Resonance/3.01%3A_Resonance/3.1.01%3A_Resonance_ExamplesResonance occurs in an oscillating system when the driving frequency happens to equal the natural frequency. If the frequency of the push equals the natural frequency of the swing, the motion gets big...Resonance occurs in an oscillating system when the driving frequency happens to equal the natural frequency. If the frequency of the push equals the natural frequency of the swing, the motion gets bigger and bigger. We start at low driving frequencies and measure the amplitude of the motion (how far it bounces) at each frequency. So the natural frequency of the system without the vibrator was also 2.5\text{ Hz}. Why is the amplitude of the cart larger at one particular frequency?
- https://phys.libretexts.org/Bookshelves/Waves_and_Acoustics/Book%3A_Sound_-_An_Interactive_eBook_(Forinash_and_Christian)/13%3A_Voice/13.01%3A_The_Human_Voice/13.1.03%3A_PhonemesExamples in English are found in the words 'eye', 'hay', 'boy', 'low', and 'cow'. A similar sort of thing happens for the gliding consonants which can further be broken down into semivowels such as 'w...Examples in English are found in the words 'eye', 'hay', 'boy', 'low', and 'cow'. A similar sort of thing happens for the gliding consonants which can further be broken down into semivowels such as 'w' and 'y' and liquids such as 'l' and 'r'. In all of these cases the formants change during the creation of the sound.
- https://phys.libretexts.org/Bookshelves/Waves_and_Acoustics/Book%3A_Sound_-_An_Interactive_eBook_(Forinash_and_Christian)/06%3A_Wave_Behavior/6.06%3A_Adding_Wave_PulsesWhen two waves of the same type come together it is usually the case that their amplitudes add. So two overlapping water waves have an amplitude that is twice as high as the amplitude of the individua...When two waves of the same type come together it is usually the case that their amplitudes add. So two overlapping water waves have an amplitude that is twice as high as the amplitude of the individual waves. This is called constructive interference and it can occur for sinusoidal waves as well as pulses.
- https://phys.libretexts.org/Bookshelves/Waves_and_Acoustics/Book%3A_Sound_-_An_Interactive_eBook_(Forinash_and_Christian)/09%3A_The_Ear_and_Perception/9.02%3A_Beats/9.2.03%3A_Other_Interesting_Auditory_PhenomenaFor example if you see a set of lips forming the sound "ga" while you are hearing the sound "ba" you will perceive the sound "da". There are many other examples where visual clues affect what you thin...For example if you see a set of lips forming the sound "ga" while you are hearing the sound "ba" you will perceive the sound "da". There are many other examples where visual clues affect what you think you hear; YouTube example. The Auditory Neuroscience Website is a wonderful source of sound samples and videos of various auditory illusions, demonstrations of acoustic phenomena and indepth discussions of hearing loss.
- https://phys.libretexts.org/Bookshelves/Waves_and_Acoustics/Book%3A_Sound_-_An_Interactive_eBook_(Forinash_and_Christian)/01%3A_Basics/1.01%3A_Basics-_Work_and_Energy/1.1.03%3A_Density_and_PressurePressure in a liquid or gas is the weight of the liquid pushing downward on an area at a given depth (and is measured in the same units as pressure) or P=\rho gh where h is the depth, \rho...Pressure in a liquid or gas is the weight of the liquid pushing downward on an area at a given depth (and is measured in the same units as pressure) or P=\rho gh where h is the depth, \rho (Greek letter rho) is the density in kilograms per meter cubed, and g is gravitational acceleration.
- https://phys.libretexts.org/Bookshelves/Waves_and_Acoustics/Book%3A_Sound_-_An_Interactive_eBook_(Forinash_and_Christian)/10%3A_Strings/10.02%3A_Plucked_String/10.2.01%3A_Plucked_StringIf the string is bowed, however, the triangle wave is maintained since the bow continues to pull the string to one side at the point of contact. When the point of the triangle shape returns to the bow...If the string is bowed, however, the triangle wave is maintained since the bow continues to pull the string to one side at the point of contact. When the point of the triangle shape returns to the bow it causes the string to break loose from the bow. The wave continues and reflects off the fret end, returning to the bow again, now causing the string to stick to the bow.
