The attachment is adapted to be used as a hearing aid for catching a voice sound issued from the conversation partners when the hearing-impaired person makes conversation to his or her partners through the cellular phone. The attachment is constructed of: a microphone disposed closely adjacent to...
1, corresponding segments are retained'and suppressed in each period of fundamental length chosen somewhat arbitrarily to be about the length of the voiced periods. This means that the rate of interruption has to be related to the fundamental frequency of the voice since otherwise the dividing ...
This instrument was fitted with a volume control and an improved design of ASTIC transformer. It was designed for use with a Repeater, Telephonic No. 17A (another battery-operated valve amplifier) and a Bellset No.26 for the hard of hearing in CB/auto exchange areas. Telephone No. 238 CB...
When a voice from an opposite party is hard of hearing because noise is remarkably large, the switch 2 interrupts the output of the transmitter section to prevent sidetone from entering the receiver section 4. Thus, side tone is completely prevented to allow to easily listen to the opposite ...
I have always kept the Museum free of charge to everyone, and I wish I could keep it open forever. The very last thing I want to see is for any of the collection go for scrap. I have sunk too much work, sweat and tears into it to see all my work go to waste, and I don't...
Voice Coupling using 30A Voice Coupler. Provides 2-wire connection of customer-provided voice transmitting and/or receiving equipment to Bell lines, DC isolation and limits excessive line signal. Has a standard ¼” phone plug on the right side. Connection is made by operating the exclusion ke...
CLINICAL NOTES PORTABLE TELEPHONE AMPLIFIER There has long been a need for a device that would allow the hard-of-hearing patient to use any telephone anytime and place without inconvenience or embarr... Hosmer,N Matthew - 《Journal of the American Medical Association》 被引量: 0发表: 1956年...
Telephone voice amplifierdoi:USD216020 SJames F. DivietroUS
Voice current amplifier for long distance telephone linesADLER LEE E.
PROBLEM TO BE SOLVED: To provide a portable telephone attachment for hearing-impaired people that suitably acts like an auxiliary device to allow people having a tendency to hard of hearing to mainly hear a voice uttered by a speech opposite party. SOLUTION: The portable telephone attachment for...