# Discuss the Sound Technology and their Uses

## Sound.

• Humidity
Humidity is the amount of moisture in the air relative to its saturation point at that temperature. A high humidity level can cause mold to grow on your buds if they are not properly stored. If you live in a humid climate, make sure to keep your bud dry and store them in a cool, dark place.
• Temperature
Temperature is the measure of heat in the environment. In general, the higher the temperature, the faster the rate of chemical reactions. This means that the longer you leave your buds out, the more likely they are to start drying out. Keep your buds away from direct sunlight, and wrap them tightly in plastic bags to prevent any light exposure.
• CO2
CO2 is carbon dioxide, which is a gas that is produced naturally by the body. When you exhale, you release this gas into the atmosphere. However, too much CO2 can have negative effects on the health of your plants. Make sure that your grow room has enough ventilation to allow for proper airflow.

## Types of Sounds

• Squeak
Squeaks are sounds that can be heard when the leaves of a plant are rubbed together. They are usually caused by insects feeding on the plant. This sound is often associated with aphids.
• Squeal
Squeals are similar to squeaks but they are much louder and can be heard from farther away. These noises are usually caused by caterpillars eating the leaves of the plant.
• Scratch
Scratches are sounds that are created when the leaves of a cannabis plant rub against each other. They are usually caused when the plant is being watered.

## Plane waves.

• Plane Waves are created when a wave travels through a medium that has no mass. This can occur in water, air, or any other type of fluid. When this occurs, the particles move at constant speed without changing direction. In order to create plane waves, we need to have a medium that does not interact with the wave. We can use glass, plastic, or even wood to do this.
• Standing Waves are created when a particle oscillates back and forth in a medium. These types of waves are commonly seen in strings, pipes, and standing water. They are created when the frequency of the wave matches the natural frequency of the medium. If the frequency is too high, then the wave will travel faster than the medium. If the wave is too low, then the wave will slow down until it reaches its natural frequency.
• Surface Waves are created when a surface moves across a liquid. This can happen when a boat moves across the ocean or when a person walks along the shoreline. A surface wave is similar to a standing wave except that the amplitude of the wave is much smaller.
• Sine Waves are created when a string vibrates back and forth. This happens when a guitar string is plucked or a drumstick hits a drumhead. Sine waves are used to produce sound.
• Cosine Waves are created when two sine waves combine together. This creates a wave that looks like a combination of both sine waves.

## Wavelength Period and Frequency.

Wavelength – This refers to the length of time that light travels through a certain material. In this case, we are talking about the wavelength of light. Wavelengths can be measured in micrometers (µm) or nanometers (nm). A nanometer is 1 billionth of a meter.
Period – Period is how long a wave lasts. If you have ever taken a physics class, you may remember that waves last for a specific amount of time before they disappear. Waves are either sinusoidal or square waves. Sinusoidal waves are much easier to measure than square waves.
Frequency – Frequency is the number of times per second that a wave repeats. A sine wave has a constant frequency. Square waves do not repeat at a consistent rate.

## Amplitude or Intensity.

1. Amplitude
The amplitude of a wave is how high or low the peak of the wave is. In the case of sound waves, this refers to the loudness of the sound. Amplitude can be measured using decibels (dB). A dB scale is used to measure the difference between two sounds. If a sound is 10 dB louder than another, then that other sound is 1 dB quieter. This means that the first sound has 10 times the amplitude of the second sound.
2. Intensity
Intensity refers to the amount of energy contained in a given volume of space. In the case of light, intensity refers to how bright or dark something appears. Light intensity can be measured in units called lux. Lux is a measurement of brightness based on the power output of a light bulb. One lux equals one lumen per square meter. So if you have a 100-watt light bulb, it would produce about 100 lumens. Lumen is a unit of luminous flux equal to the luminous intensity of a single candle at a distance of 1 m.

## The decibel Scale

• Decibels are used to measure sound pressure levels (SPL). SPL is measured in decibels relative to a reference level. A reference level is usually taken at 20 micrometers (μm) above sea level. The decibel scale is logarithmic, meaning that each 10 dB increase represents a tenfold increase in intensity.
• The human ear can detect sounds between 0dB and about 100dB. At 100dB, the loudest noise humans can hear is called “loud blast”. Anything louder than this is considered too loud for humans to handle without damage.
• Sound waves are divided into three categories based on their frequency: low, mid-range, and high. Low frequencies have wavelengths longer than those of mid-range and high frequencies. High frequencies travel faster than mid-range and low frequencies.
• Humans can hear sounds from 20Hz to 200kHz. The lower end of the range is known as infrasound, while the upper end is ultrasonic. Ultrasounds are beyond the range of human hearing, but they can be detected through special equipment.
• Infrasound is below 20Hz and is often associated with earthquakes. Infrasound can cause nausea, dizziness, headaches, and other symptoms.
• Mid-range frequencies fall between 20Hz and 20kHz. These are the frequencies we use to communicate with each other. They are also used to make music.

## Speed of sound in Liquid

1. Speed of Sound in Liquid
Speed of sound in liquids (SOSL) refers to the speed at which sound travels through a liquid. This measurement can be used to determine the density of a liquid. Density is defined as mass per unit volume. A higher density means that the substance has a greater mass per unit volume than water.
2. Formula
Formula is the ratio between two quantities. In this case, we are using the formula for calculating speed of sound in liquid. The formula for calculating SOSL is:
$$\math{SOSL} \sqrt{\f{1}{\rho}}$$
Where $\rho$ is the density of the liquid.

## Speed of sound in Gases

Speed of Sound (SOS) is the speed at which energy travels through a gas or liquid. This can be measured using a device called a Sonic Anemometer.
The formula for calculating the speed of sound in air is:
$$c \sqrt{\f{K_T}{\rho}}$$
Where $c$ is the speed of sound, $K_T$ is the bulk modulus of the material, $\rho$ is the density of the material, and $g$ is acceleration due to gravity.
For example, if we take the density of air ($\rho_{air} 1.225 kg/m^3$), then the speed of sound in the air would be approximately 343 m/s.
If we were to calculate the speed of sound in water, we would use the following equation:

## Speed of sound in Solids

1. Speed of Sound (SOS) in Solids
The speed of sound in solids is defined as the velocity at which a wave travels through a solid material. This can be measured using a device called a “sonic” meter. The sonic meter has two parts: a transmitter and receiver. When the transmitter sends out a signal, the receiver picks up that signal and converts it into an electrical current. This current then goes to a speaker where it is converted back into sound waves. The time between sending the signal and receiving the sound is measured in milliseconds. The speed of sound in soli…

## Sounds Uses.

1. Music
Music can be used to relax your mind and body. Cannabis has been known to help people who suffer from insomnia and stress. Listening to music while smoking helps to reduce anxiety and depression.
2. Sound Therapy
Sound therapy is using sound waves to heal different parts of the body. There are many types of sound therapy that use different frequencies to treat different conditions.
3. Acoustics
Acoustics is the study of how sound travels through air, water, and other materials. Acoustics is useful in many fields including medicine, engineering, and science.

## Effects of sound in our life

• Music
Music has been used for thousands of years to heal people from different illnesses. There are many types of music that can help us relax and relieve stress. Listening to relaxing music can reduce blood pressure, increase endorphin levels (feel-good hormones) and lower cortisol levels.
• Singing
Singing is a great way to express yourself and connect with others. Research shows that singing helps your brain release feel good chemicals.
• Meditation
Meditation is a great way to clear your mind and get rid of negative thoughts. A study showed that people who meditate have less anxiety and depression than those who do not.