Lena Torres
Lower sounds do have a lower frequency. Frequency, measured in hertz (Hz), refers to the number of times per second that a sound wave repeats itself. Lower-frequency sounds have longer wavelengths and are more difficult to block. They can pass through materials more easily and tend to accumulate in corners. The lower the frequency, the lower the pitch, and the fewer cycles per second. Humans can hear frequencies between 20 Hz and 20,000 Hz, with sounds below 20 Hz known as infrasound and those above 20,000 Hz as ultrasound.
| Characteristics | Values |
|---|---|
| Frequency | Refers to the number of times per second that a sound wave repeats itself |
| Units of Frequency | Hertz (Hz) |
| Lower Frequency Sounds | Have longer wavelengths |
| High-Frequency Sounds | Have shorter wavelengths |
| Low-Frequency Sounds | Are more difficult to block |
| High-Frequency Sounds | Are easily absorbed |
| Lower Frequency Sounds | Pass through bigger objects with less reflection or absorption |
| High-Frequency Sounds | Reflect back when they encounter thin objects |
| Human Audible Range | 20 Hz to 20,000 Hz |
| Infrasound | Sounds with a frequency below 20 Hz |
| Ultrasound | Sounds with a frequency above 20,000 Hz |
| Human Pain Threshold | Around 125 dB |
| Human Hearing Sensitivity | Gradually decreases as frequency reduces |
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What You'll Learn
Lower frequencies produce longer wavelengths
Sound is produced by vibrations that travel through the air or another medium as waves. The frequency of a sound wave, sometimes referred to as pitch, is the number of times per second that a sound pressure wave repeats itself. The units of frequency are called hertz (Hz). Humans with normal hearing can hear sounds between 20 Hz and 20,000 Hz. Frequencies above 20,000 Hz are known as ultrasound, and frequencies below 20 Hz are known as infrasound.
Lower-frequency sounds produce longer wavelengths. This means that as the frequency of a sound wave decreases, the wavelength of the sound wave increases. For example, a drum beat has a much lower frequency and longer wavelength than a whistle, and a bullfrog call has a lower frequency and longer wavelength than a cricket.
In general, lower-frequency sounds are associated with lower energy. Longer wavelength waves, such as radio waves, carry low energy, while shorter wavelength waves, such as X-rays, carry higher energy. However, it is important to note that the amplitude of a wave, which is the relative strength of the wave, also affects its energy. Larger amplitudes correspond to higher energy, while lower amplitudes correspond to lower energy.
In some cases, low-frequency infrasound can have unusual effects on humans. For example, some scientists have suggested that low-frequency sound may be present at allegedly haunted sites, causing people to have odd sensations that they attribute to ghosts. Additionally, animal communication often utilizes infrasound, with whales, elephants, hippopotamuses, rhinoceroses, and other animals using infrasound to communicate over long distances.
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Humans can hear frequencies between 20Hz and 20,000Hz
The commonly stated range of human hearing is between 20Hz and 20,000Hz. This range is also known as the human hearing range or audible frequency range. The lower the frequency, the fewer the oscillations. Low-frequency or low-pitched sounds are often compared to bass sounds, such as a tuba.
The human hearing range varies depending on age, exposure to loud noises, and other hearing loss risk factors. For example, the upper limit of the human hearing range can decrease to around 14,000Hz or lower in older adults. The highest-pitched sounds most people can hear fall between 15,000 and 17,000. Human infants can hear slightly above the standard human hearing frequency range, picking up on some frequencies over the 20,000Hz limit, but they usually lose that high-frequency perception as they grow older.
Under ideal laboratory conditions, humans can hear sound as low as 12Hz and as high as 28,000Hz, although the threshold increases sharply at 15,000Hz in adults. The human auditory system is most sensitive to frequencies between 2,000 and 5,000Hz.
Anything below 20Hz is considered infrasound, which is beyond the lowest frequency humans can hear. However, at higher intensities, it is possible to feel infrasound vibrations in various parts of the body.
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Lower frequencies are harder to block
Lower-frequency sounds have a lower pitch and longer wavelength than higher-frequency sounds. The frequency of a sound wave refers to the number of times per second that a sound pressure wave repeats itself, and this is measured in hertz (Hz). Generally, humans with normal hearing can perceive sounds between 20 Hz and 20,000 Hz, with sounds below 20 Hz known as infrasound and those above 20,000 Hz referred to as ultrasound.
The perception of low-frequency sounds also depends on their intensity or amplitude, which is the relative strength of sound waves that we perceive as loudness or volume. While the human ear is the primary organ for sensing low-frequency sounds, at higher intensities, people may feel infrasound vibrations in various parts of the body.
Additionally, hearing ability varies among individuals, and some people may be able to perceive lower-frequency sounds that others cannot. For example, under ideal conditions and at very high volumes, humans may be able to identify tones as low as 12 Hz. Lower frequencies can also have physiological effects, with sustained exposure potentially causing nausea, dizziness, headaches, and fatigue in some individuals.
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Lower frequencies can pass through bigger objects
Sound frequency is measured in hertz (Hz) and refers to the tone or pitch of the sound. Lower-frequency sounds have longer wavelengths and are often compared to bass sounds, such as those produced by a tuba. High-frequency sounds, on the other hand, produce shorter wavelengths and are likened to treble sounds, such as a bird or cricket chirping.
Lower-frequency waves require less energy to create than higher-frequency waves of the same amplitude. This is because, when a sound wave passes through a medium, it loses energy by transferring it to that medium. Lower-frequency waves have longer wavelengths, resulting in fewer wave cycles being required to pass through the medium, and consequently, less energy is absorbed. For example, a 20Hz wave will only lose 10% of its amplitude as it passes through a material, while a 40Hz wave will lose 20%, an 80Hz wave 40%, and so on.
The environment also influences how far low-frequency sounds travel. In environments with many obstacles, lower frequencies can travel farther than higher frequencies. This is because lower frequencies can pass through objects that are bigger than the length of the wave. For instance, highway noise or railroad whistles can often be heard above other noises depending on the listener's location.
Additionally, lower frequencies are not absorbed as well and lose less energy to the medium they are travelling through. This is why lower frequencies can pass through bigger objects more easily and travel farther.
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Lower frequencies are associated with bass sounds
Sound frequency is measured in hertz (Hz) and refers to the tone or pitch of a sound. Lower-frequency sounds produce longer wavelengths and are associated with bass sounds. For example, the sound of a drum has a much lower frequency than a whistle, and a bullfrog call has a lower frequency than a cricket.
The lower the frequency, the fewer the oscillations. High frequencies produce more oscillations. Humans with normal hearing can hear sounds between 20 Hz and 20,000 Hz. Frequencies above 20,000 Hz are known as ultrasound, and frequencies below 20 Hz are known as infrasound. Infrasound is used by some animals to communicate over long distances. For example, whales, elephants, and rhinoceroses use infrasound to communicate over hundreds of miles.
In music, the bass range is where most of the fundamental frequencies of the rhythm section reside. The bass range determines how fat or thin a sound is and can add a feeling of warmth to the music. Most bass signals in modern music tracks lie around the 90-200 Hz area. The sub-bass range, from 20 to 60 Hz, is the lowest audible frequency range and is typically produced by bass-heavy instruments such as the bass guitar, which has the lowest achievable pitch of 41 Hz.
The mid-bass range is where lower frequencies become more noticeably tonal. Adjectives associated with mid-bass frequencies include "boom", "slam", and "strength". Examples of sounds with heavy mid-bass character include bass lines, kick drums, and deep voices.
The high bass and low mid-frequency range is often the busiest part of a mix, with many important components competing for space. Adjectives associated with this frequency range include "warmth", "mud", and "lush". Examples of sounds with heavy high bass/low mid character include rhythm guitars, masculine vocals, and snare drum transients.
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Frequently asked questions
Yes, lower sounds have lower frequencies.
Frequency, sometimes referred to as pitch, is the number of times per second that a sound pressure wave repeats itself. Frequency is measured in hertz (Hz).
Humans with normal hearing can hear sounds between 20 Hz and 20,000 Hz. Frequencies below 20 Hz are known as infrasound, and frequencies above 20,000 Hz are known as ultrasound.
It is commonly believed that low-frequency sounds travel longer distances. However, this may be due to the high amplitude of low-frequency sounds, which can compensate for their shorter travel distance. Additionally, low-frequency sounds can pass through bigger objects with less absorption or reflection, so they may travel farther in environments with many obstructions.
Low-frequency sounds are often compared to bass sounds, such as the notes produced by a tuba or bass guitar. Other examples include the growl of a lion, the hum of a refrigerator, and the rumble of thunder.
