The more information about physical sound, the better, the characteristics of physical sound

There are three characteristics of physical sound: pitch and loudness.

Timbre. <>

1. The concept of tone.

In physics, the pitch of a sound is called pitch.

It should be noted here that the level of the voice in the concept is different from the level of the voice we understand in life, in life, we often refer to the size of the voice, the meaning of speaking loudly and speaking quietly; In physics, the level of sound refers to the thickness and sharpness of the sound.

2. Loudness: The strength of the sound is called loudness.

Amplitude. The maximum distance that an object deviates from its original position when it vibrates is called the amplitude.

Factors that determine the magnitude of loudness: amplitude, distance from the emitter. The greater the amplitude, the greater the loudness.

Experimental: Factors that affect loudness.

Design experiment: Tie a table tennis ball to a string.

Tap the tuning fork that is making a sound.

Observe how much the ping-pong ball is bounced off. Make the tuning fork sound with different loudness, and redo the above experiment.

Phenomenon: When struck with different forces, the ping ball is bounced at different heights. The greater the force, the higher the table tennis ball will be bounced.

Conclusion: The amplitude of the emitter determines the magnitude of loudness, and the larger the amplitude, the greater the loudness.

Note: The function of the table tennis ball: to amplify the small vibrations of the tuning fork.

3. Timbre: reflects the quality of the sound.

We can distinguish different sounds based on different timbres. The timbre is determined by the emitter itself. The materials and structures of different emitters are different, and the timbre of the sound produced is also different.

The physical quantities that represent the characteristics of sound are loudness, pitch, and timbre, referred to as the three elements of sound.

1. Loudness: The subjective perception of the strength of the sound by the human ear is called loudness. Loudness is related to the amplitude of the sonic vibration.

2. Tone: The human ear's perception of the high and low sound is called tone. Tone is mainly related to the frequency of sound waves.

3. Timbre: Timbre is the characteristic that distinguishes people from two voices with the same loudness and tone, or the comprehensive response of the human ear to sound waves of various frequencies and intensities.

First there is the speed of sound, then the timbre, the pitch, the loudness. The sound intensity is in decibels.

Sound, as a wave, has amplitude and frequency.

Then there is the distinction between music and noise.

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

Listen to the physics allegro "The Characteristics of Sound" and explain it.

No matter how loud it is.

How often. In the same substance.

speed of propagation.

is unchanging.

The magnitude of the sound (loudness step, loud and small sound) is determined by the amplitude, and the pitch (high and low tones) is determined by the frequency.

If the two objects in this question are identical, then when the amplitude is the same, but one vibrates at a small frequency and the other vibrates at a high frequency (within the audible range of the human ear), two will be heard with the same loud voice, but one with a high note and the other with a low sound; If two objects vibrate at the same frequency, one with a large amplitude and the other with a small amplitude, then two voices of the same tone but one loud and the other small will be heard.