Immediate Effects of Mindfulness Meditation on the Voice

Effect of Smoking on Cepstral Parameters

Smoking exerts certain damage to the voice, which affects sound characteristics. This study explored the effects of smoking, smoking time, and smoking amount on cepstral parameters. We collected the acoustic signals of sustained vowels in 301 participants (135 smokers and 166 nonsmokers). The cepstral parameters, including cepstral peak prominence (CPP), CPP standard deviation (CPP SD), low to high-frequency spectral ratio (L/H), low to high-frequency spectral ratio standard deviation (L/H SD), and voice disorder cepstral/spectral index of dysphonia (CSID), of the sustained vowels were investigated through the analysis of dysphonia in speech and voice (ADSV) application. The effects of smoking on these parameters were explored. The influences of smoking time and smoking amount on cepstral parameters were also analyzed by multiple linear regression. The CPP and L/H values in the smoking group were lower than those in the nonsmoking group (CPP: P < 0.001, L/H: P = 0.033) and negatively correlated with smoking time (CPP: R2 = 0.3828, P < 0.0001; L/H: R2 = 0.02996, P = 0.0447) and smoking amount (CPP: R2 < 0.4526, P < 0.0001; L/H: R2 = 0.08823, P = 0.00005). The CPP SD, L/H SD, and CSID values in the smoking group were higher than those in the nonsmoking group (CPP SD: P = 0.006, L/H SD: P = 0.034, CSID: P < 0.001) and positively correlated with smoking time (CPP SD: R2 = 0.03648, P = 0.0265, L/H SD: R2 = 0.09121, P = 0.0004, CSID: R2 = 0.01247, P = 0.1972) and smoking amount (CPP SD: R2 = 0.05495, P = 0.0062, L/H SD: R2 = 0.1316, P < 0.0001, CSID: R2 = 0.03851, P = 0.0225). Compared with other cepstral parameters, smoking time and smoking volume had the greatest impact on CPP (smoking time: R2 = 0.385, smoking amount: R2 = 0.443). This study confirmed that smoking has a significant effect on cepstral parameters. Compared with the cepstral parameters of nonsmokers, an increase in smoking time and smoking volume increases the abnormality of the cepstral parameters of smokers.

Effects of an 8-Week Mindfulness Course in People With Voice Disorders

OBJECTIVES

Nearly every modern textbook on the etiology and treatment of voice disorders (VD) recommends stress reduction for VD patients. The benefits of mindfulness for stress reduction are well documented, but published literature on mindfulness and VD is sparse. Our objective was to determine whether an 8-week mindfulness course could increase mindfulness and lower stress in people with VD, leading to a decrease in vocal handicap.

STUDY DESIGN

Mixed methods study.

METHODS

Participants: 69 individuals with VD: 39 were mindfulness course participants (MCP), 30 were in a waitlist control group (WCG). Exclusionary criteria: patients in voice therapy. Before and after the 8-week timeframe, participants took the Mindful Attention and Awareness Scale (MAAS), Perceived Stress Scale-10 (PSS-10), Voice Handicap Index (VHI), and-for singers (n = 36)-the Singing Voice Handicap Index (SVHI). Follow-up interviews were conducted with select participants.

RESULTS

In the MCP, each of the outcomes significantly changed in the direction hypothesized, resulting in increased MAAS (P = 0.000) and decreased PSS-10 (P = 0.007), VHI (P = 0.000), and SVHI (P = 0.021, n = 22) scores. Using a 2 × 2 Repeated Measures ANOVA, two outcomes were statistically different for the MCP from pre to postcourse-MAAS increased (P = 0.006, ES = 0.107) and VHI decreased (P = 0.034, ES = 0.065)-in comparison to no change in the WCG. Follow-up interviews revealed increased acceptance of the VD; reduced stress, physical tension, and pain/discomfort; increased somatic (or interoceptive) awareness; community with other VD patients; and positive speaking and singing voice changes.

CONCLUSIONS

An 8-week mindfulness course shows promise for reducing stress in people with VD, lowering voice handicap, and improving quality of life. Future research should evaluate mindfulness in patients with specific voice disorders; patients with higher and lower VHI scores; singers; and patients who experience throat pain. Mindfulness should also be evaluated within a standard voice therapy protocol.