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The three normal lung sounds are bronchial, bronchovesicular, and vesicular. Bronchial lung sounds. Your doctor can hear these most clearly when you breathe out.
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When you inhale and exhale, the air in your lungs and airways may create turbulence called respiratory sounds — also known as “lung sounds” or “breath sounds.” You may know these sounds as “coughing” and “wheezing” but there’s actually a lot more to these sounds than you might initially realize.
Respiratory sounds, also known as lung sounds or breath sounds, are the specific sounds generated by the movement of air through the respiratory system. [1] These may be easily audible or identified through auscultation of the respiratory system through the lung fields with a stethoscope as well as from the spectral characteristics of lung ...
- Lung Sounds
- Breath Sounds
- Voice Sounds
- Adventitious Sounds
Classified into the following three categories: 1. Breath sounds 2. Voice sounds 3. Adventitious sounds
Normal Breath Sounds
The intensity and quality of breath sounds depends on the site of Auscultation. Sounds produced in the large airways have some of their energy content attenuated and filtered during conduction through pulmonary tissue, so that only a narrow range of frequencies (<500 Hz) is heard over the chest wall in normal patients. Thus in health, over most of the chest, the breath sounds are low-pitched and have a relatively quiet expiratory phase.The inspiratory component originates in the lobar and seg...
Bronchial Breathing
Breath sounds heard close to large air passages have a louder and longer expiratory phase and their energy components extend over a broad frequency range (<200 – 4000 Hz). In health, such sounds are heard only over the large air passages e.g. the trachea. In the presence of consolidation or cavitation there is less filtration and attenuation of the sounds produced in the large airways, so that the sounds heard over the chest wall are similar to those heard over large air passages such as the...
Soft Breath Sounds
Fluid or air in the pleural space deflects sound waves away from the chest wall back into the lung and therefore breath sounds are reduced in intensity.
Voice sounds produced in the larynx are also filtered and attenuated during their conduction through lung tissue, and because of this, speech is incomprehensible when we listen to it over the chest wall with a stethoscope. In the presence of consolidation or cavitation of the lung, less filtration and attenuation occurs and therefore voice sounds c...
Crackles
These may be either coarse or fine. They are discontinuous, interrupted explosive sounds. Coarse crackles or crepitations are associated with bronchiectasis or resolving pneumonia, whereas fine crackles can be heard with either pulmonary oedema or interstitial fibrosis.
Wheezes
These may be high pitched or low pitched and are continuous sounds associated with airway narrowing due to a variety of causes, including bronchoconstriction and excessive secretions. Loud wheezes are heard with the naked ear, soft wheezes only with the stethoscope. 1. Monophonic wheezing consists of a single musical note starting and ending at different times. A local pathology-like bronchial obstruction by tumor, bronchostenosis by inflammation, mucus accumulation, or a foreign body can pro...
Stridor
Stridor is a loud, high-pitched, musical sound produced by upper respiratory tract obstruction.It is different from wheezing by the following reasons. It is louder over the neck than chest wall. Secondly; stridor is mainly inspiratory.
Nov 10, 2021 · After mastering the fundamentals of lung sounds, this intermediate course trains users on advanced forms of wheezes and crackles and introduces voiced sounds (bronchophony, egophony, whispered pectoriloquy).
Nov 24, 2023 · Lung sounds are the noises a person makes as they breathe in and out, including sounds of regular breathing. However, wheezing, crackling, stridor, and other sounds can also occur, indicating...
Feb 20, 2014 · First, the trachea carries sound from within the lungs, allowing auscultation of other sounds without filtering from the chest cage. Second, the characteristics of tracheal sounds are similar...
