Is there a difference between pitch and loudness in physics?

Loudness, also known as sound intensity or volume, indicates the intensity of the sound as perceived by the human ear. For example, a light gong sound is weak and loud; If you hit the gong hard, it will be deafening, and you will feel that the sound is very strong and loud. The magnitude of loudness depends mainly on the amplitude of the vibration of the sound source.

The experiment on page 11 of the first volume of the eighth grade textbook of the Suke edition verifies this point, if you lightly beat the drum, the loudness is small, if you put a small confetti on the drum surface, you will see that the confetti jumps very low, indicating that the amplitude is small and the loudness is small; If, hit the drum hard, the loudness is large, and at the same time see the confetti jump very high, it means that the amplitude is large and the loudness is large.

The magnitude of loudness is also related to how close the human ear is to the sound source. Because the sound energy will gradually disperse during the propagation process, the loudness will gradually decrease, for example: when thunder, when the thunder occurs closer to us, the loudness is very large, and when the place of occurrence is far away from us, it is not very loud.

The medical stethoscope uses a plastic hose to concentrate the sound energy to avoid the sound energy being dispersed and the loudness being reduced during the sound propagation process.

Pitch, also known as pitch, indicates the subjective feeling of the human ear about the pitch of the voice, and the concept of "high" in the textbook refers to the sound of the voice sounding loud and sharp; "Low" means that the voice sounds dull and steady. For example, if the flute sounds sharp and the trumpet sounds loud, it means that they are high-pitched, and the drums sound dull and steady is low-pitched.

Objectively, the magnitude of the pitch mainly depends on the vibration frequency of the sound source, the high frequency is the high tone, and the low frequency is the intermittent low. The experiment on page 12 of the first volume of the 8th grade textbook of the Suke edition is to verify this point, when the gear rotation accelerates, the frequency of the vibration of the plastic sheet accelerates, and the sound is sharp, that is, the pitch is high, on the contrary, the vibration frequency is low, the sound is dull, and the pitch is low.

Yes. Pitch refers to the pitch of the sound, which is determined by the frequency of the vibration of the sound source, and loudness refers to the magnitude of the sound, which is determined by the amplitude of the vibration of the sound source and is related to distance. For example, when watching TV, adjust the volume switch, you can control the volume of the sound, but you can't change the pitch In the language used in daily life, "high and low" is often used to indicate the size of the sound, such as the "high" in "loud noise", which does not refer to the pitch, but to the "size" of the sound In learning, we must pay attention to the difference between the sound size and the height.

Yes Pitch is the frequency of a sound and Loudness is the magnitude of a sound.

1. The tone is determined by the vibration frequency of the emitter, the higher the frequency, the higher the tone; The lower the frequency, the lower the pitch, and the pitch is also related to the structure of the emitter, because the structure of the emitter affects the frequency of the sound.

2. The magnitude of loudness depends on the sound intensity, pitch, timbre, length and other conditions.

All else being equal, vowels sound better than auxiliaries. In vowels, a low vowel with a large opening sounds better than a high vowel with a small opening; In consonants, voiced sounds are clearer than sounds, and aspirated sounds are better than unaspirated sounds.

Physically, pitch is determined by frequency, and high frequencies (the number of vibrations per unit of time) are associated with higher pitch;

Loudness is determined by amplitude, with large amplitude, high loudness, and large volume;

Timbre is the sound characteristic of the sound emitter, and generally the musical sound emitted by a musical instrument can be decomposed into the synthesis of many single sine waves with different amplitude periods, and the difference of these single components causes the different timbre of the overall synthesized musical sound.

Loudness and pitch in physics.

The pitch is determined by the frequency of the sound, and the higher the frequency, the higher the pitch;

Loudness is determined by the amplitude of the sound source, the greater the amplitude, the greater the loudness; Loudness is also related to the distance of the sound source, the sound source has the same amplitude, and the farther the listener is from the sound source, the louder it is.

Source: Pitch is related to the frequency of the emitter's vibration. The higher the frequency, the higher the pitch; The lower the frequency, the lower the pitch.

The frequency of the piano**c is per second. The frequency of human sounds ranges from 85 to 1,100 times per second. Bass singers can be as low as 65 per second

times, while soprano singers can be as high as 1180 times per second.

There is a certain limit to how much a person can hear the treble and bass, and most people are able to hear it.

The frequency range of the sound is about 20 to 20,000 times per second.

The maximum distance that an object deviates from its original position when it vibrates is called the amplitude. Experiments have shown that tuning forks.

The greater the amplitude of the fork strand and rubber band, the louder the sound people hear.

Therefore, the magnitude and loudness of the sound perceived by the human ear are related to the amplitude of the emitter.

System. The greater the amplitude, the greater the loudness; The lower the amplitude, the less loudness.

Loudness is also related to the distance from the emitter. Sound travels from the vocal body in all directions and becomes more dispersed the farther away it goes, so the farther away people are from the vocal body, the smaller the sound they hear. If you can find a way to reduce the dispersion of the sound, you can make the sound louder.

1. The meaning is different.

The human ear's perception of how high or low a sound is called pitch. Sometimes it also refers to the thickness, crispness, or dullness of the sound. It is generally described as "high" and "low".

The subjective perception of the strength of a sound by the human ear is called loudness. Sometimes it also refers to the severity of the sound. It is generally described as "big" and "small".

2. The influencing factors are different.

Pitch is related to frequency, and the higher the frequency, the higher the pitch. The speed of the vibration of the object, that is, the frequency of the vibration of the object, the pitch of the sound is divided into high and low. The faster the object vibrates, the greater the frequency and the higher the pitch; The slower the object vibrates, the lower the frequency and the lower the pitch.

Loudness is related to amplitude, and the greater the amplitude, the louder it is. Loudness is also related to the distance of the emitter. The closer you are to the emitter, the louder it becomes; The farther away from the emitter, the less loud it is.

3. The changes in communication are different.

The pitch is fixed during the propagation of sound.

As the sound travels, the loudness changes. The farther the distance traveled, the louder the sound became.

The differences between loudness, pitch and timbre are as follows:

1. The level of sound frequency is called pitch, which is one of the three main subjective attributes of sound. It indicates the degree to which a person's hearing can distinguish the tone of a sound. The pitch is mainly determined by the frequency of the sound and is also related to the intensity of the sound.

2. For a pure tone of a certain intensity, the tone rises and falls with the rise and fall of the frequency: the tone of the pure tone of a certain frequency and the pure tone of the low frequency decreases with the increase of sound intensity, while the tone of the high-frequency pure tone increases with the increase of intensity.

3. Timbre refers to the fact that different sound expressions always have different characteristics in terms of waveform, and different objects have different characteristics in vibration. Different sound emitters have different timbres due to their different materials and structures. For example, the sound of a piano and violin is not the same as that of a person, and the sound that each person makes is different.

Because God has done this, we can understand timbre as the characteristic of sound.

4. Loudness is also known as volume. The strength of the sound perceived by the human ear is a subjective perception of the magnitude of the sound. The magnitude of the loudness is determined by the amplitude of the sound reception, and the farther the amplitude travels to the same sound source, the smaller the loudness; When the propagation distance is constant, the amplitude of the sound source is larger, and the loudness is larger.

The magnitude of loudness is closely related to sound intensity, but the change of loudness with sound intensity is not a simple linear relationship, but is close to a logarithmic relationship. When the frequency of sound and the waveform of sound waves change, people's perception of loudness will also change.

Pitch refers to the pitch of the sound. It is determined by the frequency of the vibration of the sound source. In life, the sharper the sound we hear, the higher the pitch; Conversely, the deeper the voice, the lower the pitch;

Timbre is the quality of the sound. The two of them sang the same song accurately at the same time, and their pitches were the same, but we were still able to distinguish their voices. That's because their timbre is different.

Loudness is the strength of the sound perceived by the human ear. It is determined by the amplitude (amplitude) of the vibration of the sound source and the distance from the sound source. Speaking loudly is louder than speaking softly.

The pitch is determined by the frequency of vibration.

Loudness is determined by the amplitude of the vibration.

The timbre is determined by the material, size, and material of the sound.

Tone: Determined by the frequency of vibration.

Loudness: Determined by the amplitude of vibration.

Timbre: Determine the sound material, size, material, etc.

Eat up the physical characteristics of sound – loudness and timbre.