# Relationship between loudness and sound intensity

### What is the relationship between "loudness" and "sound intensity"? | Socratic

Loudness and Intensity of sound are related by the following formula: [math]\text{ L}=10 What is the relation between wave length and intensity of a sound?. Sound intensity level and Loudness - loudness, a quantity which is more gives the relationship between loudness (in phons) and intensity level (in decibels). The calculator answers: 12 dB level difference equals a sound intensity factor of or a sound pressure factor of , or a loudness factor of Do we.

Instead, amplitude measurements are almost always used as the raw data in some computation.

When done by an electronic circuit like the circuits in a telephone that connect to a microphone the resulting value is called intensity. When done by a neuronal circuit like the circuits in your brain that connect to your ears the resulting sensation is called loudness.

The intensity of a sound wave is a combination of its rate and density of energy transfer. It is an objective quantity associated with a wave.

## Intensity and Loudness

Loudness is a perceptual response to the physical property of intensity. It is a subjective quality associated with a wave and is a bit more complex. As a general rule the larger the amplitude, the greater the intensity, the louder the sound. Sound waves with large amplitudes are said to be "loud". Sound waves with small amplitudes are said to be "quiet" or "soft".

### waves - Sound Intensity and Frequency Relation - Physics Stack Exchange

The students can take a sound meter to different areas around the school to collect data. Students should record the time and conditions at which they sampled the data. Using reliable books, articles, and websites, students research how sounds affect people and the natural environment. They can examine both positive and negative effects of sounds of differing loudness, intensity, and duration. Students also investigate methods by which sound intensity can be reduced.

Students go to the place where they will be examining the effects of sound, such as a nearby park. Students bring sound level meters preferably capable of measuring dBA to record sound intensities. Students will listen and record all sounds heard over a 15 minute period. Students will listen and record only intrinsic sounds for 10 minutes those sounds typical of the park's daily operationswhich may be natural and cultural like sound of a blacksmith's hammer at Herbert Hoover National Historic Site.

### Intensity and Loudness

Students listen and record extrinsic sounds not typical of the place such as nearby traffic, for 10 minutes. Record observations about weather conditions and characteristics of the place while recording the data.

Discuss which sounds contribute to the park's purpose and which are disruptive or not consistent with visitors' enjoyment of the park. Students may also want to determine which animals are native to the park and determine how the various sounds may affect them.

• What is the relationship between "loudness" and "sound intensity"?
• Hearing - Sound
• Distinguish between loudness and intensity of sound.

Use the students' data and research to assess how the sound levels and intensities may be impacting the place they visited. Compare the data to those already collected by others. Consider how the sound levels may affect the natural residents of the park or human visitors.

## Sound intensity

It's often necessary to estimate how much a sound level changes. Our ears interpret a wide range of sound amplitudes, volume or loudness as change in level and change in loudness. The decibel is a very convenient unit for measuring signal levels in electronic circuits or sound pressure levels in air. However, changes in the loudness of sounds as perceived by our ears do not conform exactly to the corresponding changes in sound pressure level.

Loudness is the quality of a sound that is the primary psychological correlation of physical strength amplitude. Loudness, a subjective feeling, is often confused with objective measures of sound pressure level SPL such as decibels.

Sound level or noise level is a physical quantity measured with measuring instruments. That is not the same. We are told by psycho-acousticians that a level 10 dB greater usually means "double the loudness" or "twice as loud".

A decibel is one-tenth of a bel, which is the logarithm of the ratio of any two energy-like quantities or two field-like quantities. In the newsgroups these often misunderstood statements are explained rather less accurately.