Hinged acoustical voice tube

Details Hinged acoustical voice tube Hinged acoustical voice tube

1988-07-29

1990-05-22

Fuller, B. R.

Acoustics

Speaking tubes

Tubes

181 18, 181 20, G10K 1100

Patent

active

049269615

ABSTRACT:
An acoustical voice tube, comprising an acoustical hollow upper piece and an acoustical hollow lower piece in hinged connection permits voice or sound tube positioning over a large area without changing the sound characteristics.

REFERENCES:
patent: 1148781 (1915-08-01), Pridham et al.
patent: 3548118 (1970-12-01), Hutchings
patent: 3993879 (1976-11-01), Larkin
patent: 4090042 (1978-05-01), Larkin
patent: 4118606 (1978-10-01), Larkin

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