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Research findings

Here are some of the Research findings

An Exploratory Pilot Study adapted from Journal of Alzheimer’s Disease

The Physioacoustic Chair delivers low frequency sound waves (27-86 Hz) to a comfortably sitting person. A variety of health benefits have been documented following the use of this chair in trials conducted on the elderly population including improved mobility levels, decreased cholesterol levels and improved circulation.

Our trial of the chair was aimed at assessing impact on:

agitation/ restlessness in the dementia residents

level of pain

level of mobility.

Since 40 Hz seems generally implicated in intra-brain communication, may stimulate neural out-growth, shows a decrease with the onset of Alzheimer’s disease (AD), and has the potential to drive gamma response with auditory or somatosensory stimulation, 40 Hz appears to be a logical frequency for brain stimulation in AD patients and this study provides some evidence of its effect.
40 Hz treatment appeared to have the largest impact on persons having mild to moderate AD.


A Trial was done at Residential Aged Care setting in Gold Coast Australia and carried out during April - May 2011


All participants were high care residents with multiple diagnoses living in an aged care facility at the time of the trial.

6 dementia residents aged between 75 and 85, all of whom regularly displayed behaviours of wandering/ agitation, were involved in the first trial.

6 residents, aged between 75 and 98, with significant pain issues were involved in the second group.

6 residents aged between 77 and 89 were assessed for effect on mobility.



Residents received 3-4 sessions per week over an 8-week trial period. Sessions were specific for relaxation, pain management or activity according to programs supplied with the chair.  All residents who participated in the trial were comfortable sitting in the chair.
The chair was used for the dementia residents at times when the wandering/agitated behaviours were evident. In all cases, there was a marked decline in these behaviours reported by carers directly involved with the residents. Pain level was assessed before the commencement of the trial, reassessed immediately after the use of the chair and residents were asked how long they noticed a change in pain levels. Pain was scored on a scale of 1-10 for each situation. These residents all had high levels of initial pain reporting levels of 7-9. In all but one case, residents reported a consistent decrease of 3 points for their level of perceived pain with use of the chair. Pain was reported to remain decreased for a period of 3-4 hours. The other resident reported complete relief of level 9 pain, lasting for 24 hours, consistently reporting this relief to her daughter. This result was significantly different to reports from other residents as indicated.
Mobility level was assessed by timing residents’ ability to walk 5 metres using their normal level of assistance e.g. wheeled walker/ rollator and/or staff assistance with walk belt. This level of assistance was consistent pre-trial and post-trial. All these 27/05/2011 elderly residents demonstrated marked improvements in mobility levels, ranging from 25.65% improvement to 75.49% improvement. Average improvement in time taken to walk 5 metres was 47.13%. This improvement is especially significant as all these residents were nursing home residents with significant gait problems. No other mobility therapies were conducted during this trial period.

A study protocol for a Randomized Controlled Trial for the Effectiveness of Physio Acoustic Sound (PAS) therapy in demented nursing home residents with nocturnal restlessness was also done.


The research population consists of demented nursing home patients residing in one of the five psychogeriatric nursing wards of Zorgspectrum Het Zand. Each ward has about 30 patients, who each have a single bedroom and share a common living room (8 to 10 people).

Effects of a low-frequency sound wave therapy program on functional capacity, blood circulation, and bone metabolism in frail old men and women; a randomized, controlled trial.


The intervention group underwent sound wave therapy, 3-5 times a week for 30 minutes per session over a period of 6 months. The control group received no intervention.

Main measurements: Blood pressure, functional capacity, mobility, bone density, biochemical markers, isometric muscle strength, balance, and skin surface temperature.


Compared to the control group, the intervention group’s mobility and the amount of self-reported kilometres walked per week increased (3 km, p<0.05), while levels of cholesterol [4.97 (0.72) to 4.52 (0.65) mmol/l, p=0.019] low density lipoprotein [2.82 (0.72) to 2.45 (0.61) mmol/l, p=0.022], bone markers of total osteocalcin [11.3 (6.6) to 10.0 (5.9) ng/ml, p=0.037)] and tartrate-resistant acid phosphatase isoform 5b [2.53 (1.0) to 2.48 (1.1) IU/l, p=0.016)] decreased. The average skin surface temperature was significantly higher during active sessions at the end of the intervention than in the beginning (p=0.004). No change was found during placebo sessions.

Conclusions: Low-frequency sound wave therapy may have the potential to promote well-being of frail elderly subjects via improved functional capacity, especially in subjects who are too frail to undertake exercise.